Merge "Check if already on main thread when getting SSG for SCVH" into udc-dev

        @Override

        public ISurfaceSyncGroup getSurfaceSyncGroup() {

            CompletableFuture<ISurfaceSyncGroup> surfaceSyncGroup = new CompletableFuture<>();

            // If the call came from in process and it's already running on the UI thread, return

            // results immediately instead of posting to the main thread. If we post to the main

            // thread, it will block itself and the return value will always be null.

            if (Thread.currentThread() == mViewRoot.mThread) {

                return mViewRoot.getOrCreateSurfaceSyncGroup().mISurfaceSyncGroup;

            } else {

                mViewRoot.mHandler.post(

                        () -> surfaceSyncGroup.complete(

                                mViewRoot.getOrCreateSurfaceSyncGroup().mISurfaceSyncGroup));

            }

            try {

                return surfaceSyncGroup.get(1, TimeUnit.SECONDS);

            } catch (InterruptedException | ExecutionException | TimeoutException e) {