tst_QVideoWidget times out using Android default backend.

QVideoWidget gets blocked because of a hanging thread on QAndroidTextureVideoOutput. This thread waits() on the destructor forever. Adding a timeout, will crash because of "Cannot make QOpenGLContext current in a different thread" in makeCurrent function.

Notice that this does not happen using the example on the device, and it is not happening when using the FFmpeg backend, so it is postponed for later investigation.