RemoteExecutionService: Action.Command to set output_paths

This is a follow-up to bazelbuild#18198

Make Bazel compatible with newer version of Remote Api by setting
output_paths along-side output_directories and output_files. The latter
2 are deprecated in newer REAPI specification.

src/main/java/com/google/devtools/build/lib/remote/RemoteExecutionService.java

@@ -236,7 +236,9 @@ static Command buildCommand(
     Collections.sort(outputFiles);
     Collections.sort(outputDirectories);
     command.addAllOutputFiles(outputFiles);
+    command.addAllOutputPaths(outputFiles);
     command.addAllOutputDirectories(outputDirectories);
+    command.addAllOutputPaths(outputDirectories);
 
     if (platform != null) {
       command.setPlatform(platform);

src/test/java/com/google/devtools/build/lib/remote/RemoteExecutionServiceTest.java

@@ -193,6 +193,7 @@ public void buildRemoteAction_withRegularFileAsOutput() throws Exception {
     RemoteAction remoteAction = service.buildRemoteAction(spawn, context);
 
     assertThat(remoteAction.getCommand().getOutputFilesList()).containsExactly(execPath.toString());
+    assertThat(remoteAction.getCommand().getOutputPathsList()).containsExactly(execPath.toString());
     assertThat(remoteAction.getCommand().getOutputDirectoriesList()).isEmpty();
   }
 
@@ -228,6 +229,7 @@ public void buildRemoteAction_withUnresolvedSymlinkAsOutput() throws Exception {
 
     assertThat(remoteAction.getCommand().getOutputFilesList()).containsExactly("path/to/link");
     assertThat(remoteAction.getCommand().getOutputDirectoriesList()).isEmpty();
+    assertThat(remoteAction.getCommand().getOutputPathsList()).containsExactly("path/to/link");
   }
 
   @Test

src/test/java/com/google/devtools/build/lib/remote/RemoteSpawnRunnerWithGrpcRemoteExecutorTest.java

@@ -342,6 +342,7 @@ public int maxConcurrency() {
                     .setValue("value")
                     .build())
             .addAllOutputFiles(ImmutableList.of("bar", "foo"))
+            .addAllOutputPaths(ImmutableList.of("bar", "foo"))
             .build();
     cmdDigest = DIGEST_UTIL.compute(command);
     channel.release();