Merge "GpuMemTracer: remove the sleep workaround"

    mGpuMem = gpuMem;

    perfetto::TracingInitArgs args;

    args.backends = perfetto::kSystemBackend;

    // TODO(b/160016498): Find a better way to wait for traced

    // Sleep for 30 seconds to make sure the data source is registered only

    // after traced starts.

    sleep(30);

    perfetto::Tracing::Initialize(args);

    registerDataSource();

    std::thread tracerThread(&GpuMemTracer::threadLoop, this);