doc: emphasize building examples on master branch should follow COMPILING

Resolves #5115

COMPILING.md

@@ -1,12 +1,13 @@
 Building gRPC-Java
 ==================
 
-Building is only necessary if you are making changes to gRPC-Java.
+Building is only necessary if you are making changes to gRPC-Java or testing/using a non-released
+ version (e.g. master HEAD) of gRPC-Java library.
 
 Building requires JDK 8, as our tests use TLS.
 
 grpc-java has a C++ code generation plugin for protoc. Since many Java
-developers don't have C compilers installed and don't need to modify the
+developers don't have C compilers installed and don't need to run or modify the
 codegen, the build can skip it. To skip, create the file
 `<project-root>/gradle.properties` and add `skipCodegen=true`.
 

RELEASING.md

@@ -42,8 +42,11 @@ $ VERSION_FILES=(
   examples/android/clientcache/app/build.gradle
   examples/android/helloworld/app/build.gradle
   examples/android/routeguide/app/build.gradle
+  examples/example-alts/build.gradle
   examples/example-kotlin/build.gradle
   examples/example-kotlin/android/helloworld/app/build.gradle
+  examples/example-tls/build.gradle
+  examples/example-tls/pom.xml
   )
 ```
 

examples/README.md

@@ -9,8 +9,11 @@ You may want to read through the
 [Quick Start Guide](https://grpc.io/docs/quickstart/java.html)
 before trying out the examples.
 
-To build the examples, run in this directory:
+To build the examples,
 
+1. **[Install gRPC Java library SNAPSHOT locally, including code generation plugin](../COMPILING.md) (Only need this step for non-released versions, e.g. master HEAD).**
+
+2. Run in this directory:
 ```
 $ ./gradlew installDist
 ```
@@ -41,6 +44,9 @@ information.
 ## Maven
 
 If you prefer to use Maven:
+1. **[Install gRPC Java library SNAPSHOT locally, including code generation plugin](../COMPILING.md) (Only need this step for non-released versions, e.g. master HEAD).**
+
+2. Run in this directory:
 ```
 $ mvn verify
 $ # Run the server

examples/android/README.md

@@ -14,12 +14,7 @@ PREREQUISITES
 INSTALL
 -------
 
-1. (Only for non-released versions) Install gRPC Java
-```sh
-$ cd ../..
-$ ./gradlew install -PskipCodegen=true
-$ cd examples/android
-```
+1. **[Install gRPC Java library SNAPSHOT locally, including code generation plugin](../../COMPILING.md) (Only need this step for non-released versions, e.g. master HEAD).**
 
 2. Install the app
 ```sh

examples/example-kotlin/README.md

@@ -9,8 +9,11 @@ You may want to read through the
 [Quick Start Guide](https://grpc.io/docs/quickstart/java.html)
 before trying out the examples.
 
-To build the examples, run in this directory:
+To build the examples,
 
+1. **[Install gRPC Java library SNAPSHOT locally, including code generation plugin](../../COMPILING.md) (Only need this step for non-released versions, e.g. master HEAD).**
+
+2. Run in this directory:
 ```
 $ ./gradlew installDist
 ```

examples/example-tls/README.md

@@ -5,8 +5,11 @@ The example require grpc-java to already be built. You are strongly encouraged
 to check out a git release tag, since there will already be a build of grpc
 available. Otherwise you must follow [COMPILING](../COMPILING.md).
 
-To build the example, run in this directory:
+To build the example,
 
+1. **[Install gRPC Java library SNAPSHOT locally, including code generation plugin](../../COMPILING.md) (Only need this step for non-released versions, e.g. master HEAD).**
+
+2. Run in this directory:
 ```
 $ ../gradlew installDist
 ```
@@ -97,6 +100,10 @@ That's it!
 ## Maven
 
 If you prefer to use Maven:
+
+1. **[Install gRPC Java library SNAPSHOT locally, including code generation plugin](../../COMPILING.md) (Only need this step for non-released versions, e.g. master HEAD).**
+
+2. Run in this directory:
 ```
 $ mvn verify
 $ # Run the server