binder: Avoid an ISE from asAndroidAppUri() (#9169)

binder/src/main/java/io/grpc/binder/AndroidComponentAddress.java

@@ -121,9 +121,17 @@ public class AndroidComponentAddress extends SocketAddress { // NOTE: Only tempo
 
   /**
    * Returns this address as an "android-app://" uri.
+   *
+   * <p>See {@link Intent#URI_ANDROID_APP_SCHEME} for details.
    */
   public String asAndroidAppUri() {
-    return bindIntent.toUri(URI_ANDROID_APP_SCHEME);
+    Intent intentForUri = bindIntent;
+    if (intentForUri.getPackage() == null) {
+      // URI_ANDROID_APP_SCHEME requires an "explicit package name" which isn't set by any of our
+      // factory methods. Oddly, our explicit ComponentName is not enough.
+      intentForUri = intentForUri.cloneFilter().setPackage(getComponent().getPackageName());
+    }
+    return intentForUri.toUri(URI_ANDROID_APP_SCHEME);
   }
 
   @Override

binder/src/test/java/io/grpc/binder/AndroidComponentAddressTest.java

@@ -16,6 +16,7 @@
 
 package io.grpc.binder;
 
+import static android.content.Intent.URI_ANDROID_APP_SCHEME;
 import static com.google.common.truth.Truth.assertThat;
 
 import android.content.ComponentName;
@@ -24,6 +25,7 @@ import android.content.Intent;
 import android.net.Uri;
 import androidx.test.core.app.ApplicationProvider;
 import com.google.common.testing.EqualsTester;
+import java.net.URISyntaxException;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.RobolectricTestRunner;
@@ -61,6 +63,30 @@ public final class AndroidComponentAddressTest {
     assertThat(addr.asBindIntent().filterEquals(bindIntent)).isTrue();
   }
 
+  @Test
+  @Config(sdk = 30)
+  public void testAsAndroidAppUriSdk30() throws URISyntaxException {
+    AndroidComponentAddress addr =
+        AndroidComponentAddress.forRemoteComponent("com.foo", "com.foo.Service");
+    AndroidComponentAddress addrClone =
+        AndroidComponentAddress.forBindIntent(
+            Intent.parseUri(addr.asAndroidAppUri(), URI_ANDROID_APP_SCHEME));
+    assertThat(addr).isEqualTo(addrClone);
+  }
+
+  @Test
+  @Config(sdk = 29)
+  public void testAsAndroidAppUriSdk29() throws URISyntaxException {
+    AndroidComponentAddress addr =
+        AndroidComponentAddress.forRemoteComponent("com.foo", "com.foo.Service");
+    AndroidComponentAddress addrClone =
+        AndroidComponentAddress.forBindIntent(
+            Intent.parseUri(addr.asAndroidAppUri(), URI_ANDROID_APP_SCHEME));
+    // Can't test for equality because URI_ANDROID_APP_SCHEME adds a (redundant) package filter.
+    assertThat(addr.getComponent()).isEqualTo(addrClone.getComponent());
+    assertThat(addr.getAuthority()).isEqualTo(addrClone.getAuthority());
+  }
+
   @Test
   public void testEquality() {
     new EqualsTester()