Fix compilation errors in binder, netty, and okhttp (issue #12979)

Author: kannanjgithub

binder/src/main/java/io/grpc/binder/internal/MultiMessageServerStream.java

@@ -175,6 +175,11 @@ public void setDecompressor(Decompressor decompressor) {
     // Ignore.
   }
 
+  @Override
+  public void triggerEvent(Object event) {
+    // Ignore.
+  }
+
   @Override
   public void optimizeForDirectExecutor() {
     // Ignore.

binder/src/main/java/io/grpc/binder/internal/SingleMessageServerStream.java

@@ -167,6 +167,11 @@ public void setDecompressor(Decompressor decompressor) {
     // Ignore.
   }
 
+  @Override
+  public void triggerEvent(Object event) {
+    // Ignore.
+  }
+
   @Override
   public void optimizeForDirectExecutor() {
     // Ignore.

netty/src/test/java/io/grpc/netty/NettyClientTransportTest.java

@@ -1343,6 +1343,10 @@ public void halfClosed() {
     @Override
     public void closed(Status status) {
     }
+
+    @Override
+    public void triggerEvent(Object event) {
+    }
   }
 
   private final class EchoServerListener implements ServerListener {

okhttp/src/test/java/io/grpc/okhttp/OkHttpServerTransportTest.java

@@ -1519,6 +1519,10 @@ public void closed(Status status) {
     public void onReady() {
     }
 
+    @Override
+    public void triggerEvent(Object event) {
+    }
+
     static String getContent(InputStream message) throws IOException {
       try {
         return new String(ByteStreams.toByteArray(message), UTF_8);