Add missing override annotation to generated protos

benchmarks/src/generated/main/grpc/io/grpc/testing/TestServiceGrpc.java

@@ -173,6 +173,7 @@ public class TestServiceGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -185,6 +186,7 @@ public class TestServiceGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

benchmarks/src/generated/main/grpc/io/grpc/testing/WorkerGrpc.java

@@ -155,6 +155,7 @@ public class WorkerGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -163,6 +164,7 @@ public class WorkerGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

compiler/src/java_plugin/cpp/java_generator.cpp

@@ -501,6 +501,7 @@ static void PrintMethodHandlerClass(const ServiceDescriptor* service,
   p->Indent();
   p->Print(
       *vars,
+      "@$Override$\n"
       "@java.lang.SuppressWarnings(\"unchecked\")\n"
       "public void invoke(Req request, $StreamObserver$<Resp> responseObserver) {\n"
       "  switch (methodId) {\n");
@@ -535,6 +536,7 @@ static void PrintMethodHandlerClass(const ServiceDescriptor* service,
 
   p->Print(
       *vars,
+      "@$Override$\n"
       "@java.lang.SuppressWarnings(\"unchecked\")\n"
       "public $StreamObserver$<Req> invoke(\n"
       "    $StreamObserver$<Resp> responseObserver) {\n"

compiler/src/test/golden/TestService.java.txt

@@ -243,6 +243,7 @@ public class TestServiceGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -259,6 +260,7 @@ public class TestServiceGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

compiler/src/test/golden/TestServiceNano.java.txt

@@ -321,6 +321,7 @@ public class TestServiceGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -337,6 +338,7 @@ public class TestServiceGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

examples/src/generated/main/grpc/io/grpc/examples/helloworld/GreeterGrpc.java

@@ -153,6 +153,7 @@ public class GreeterGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -165,6 +166,7 @@ public class GreeterGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

examples/src/generated/main/grpc/io/grpc/examples/routeguide/RouteGuideGrpc.java

@@ -223,6 +223,7 @@ public class RouteGuideGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -239,6 +240,7 @@ public class RouteGuideGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

grpclb/src/generated/main/grpc/io/grpc/grpclb/LoadBalancerGrpc.java

@@ -135,6 +135,7 @@ public class LoadBalancerGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -143,6 +144,7 @@ public class LoadBalancerGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/ReconnectServiceGrpc.java

@@ -191,6 +191,7 @@ public class ReconnectServiceGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -207,6 +208,7 @@ public class ReconnectServiceGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/TestServiceGrpc.java

@@ -281,6 +281,7 @@ public class TestServiceGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -301,6 +302,7 @@ public class TestServiceGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/UnimplementedServiceGrpc.java

@@ -153,6 +153,7 @@ public class UnimplementedServiceGrpc {
       this.methodId = methodId;
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
       switch (methodId) {
@@ -165,6 +166,7 @@ public class UnimplementedServiceGrpc {
       }
     }
 
+    @java.lang.Override
     @java.lang.SuppressWarnings("unchecked")
     public io.grpc.stub.StreamObserver<Req> invoke(
         io.grpc.stub.StreamObserver<Resp> responseObserver) {