Merge "Add read permissions to wm trace file"

            mWriteQueue.clear();

            mTraceFile.delete();

            try (OutputStream os = new FileOutputStream(mTraceFile)) {

                mTraceFile.setReadable(true, false);

                ProtoOutputStream proto = new ProtoOutputStream(os);

                proto.write(MAGIC_NUMBER, MAGIC_NUMBER_VALUE);

                proto.flush();

    }

    static WindowTracing createDefaultAndStartLooper(Context context) {

        File file = new File("/data/system/window_trace.proto");

        File file = new File("/data/misc/wmtrace/wm_trace.pb");

        WindowTracing windowTracing = new WindowTracing(file);

        new Thread(windowTracing::loop, "window_tracing").start();

        return windowTracing;