Merge "Post reportDrawFinished to the UI thread if running in system" into udc-qpr-dev

        mWmsRequestSyncGroupState = WMS_SYNC_PENDING;

        mWmsRequestSyncGroup = new SurfaceSyncGroup("wmsSync-" + mTag, t -> {

            mWmsRequestSyncGroupState = WMS_SYNC_MERGED;

            // See b/286355097. If the current process is not system, then invoking finishDraw on

            // any thread is fine since once it calls into system process, finishDrawing will run

            // on a different thread. However, when the current process is system, the finishDraw in

            // system server will be run on the current thread, which could result in a deadlock.

            if (mWindowSession instanceof Binder) {

                reportDrawFinished(t, seqId);

            } else {

                mHandler.postAtFrontOfQueue(() -> reportDrawFinished(t, seqId));

            }

        });

        if (DEBUG_BLAST) {

            Log.d(mTag, "Setup new sync=" + mWmsRequestSyncGroup.getName());