Android: fix QMediaPlayer::bufferStatus value.

It was returning the buffering progress for the whole media, which is
not what is expected according to the documentation.
It should return instead how much the playback buffer is filled. This
information is not available on Android so we simply return 100% when
the status is BufferedMedia or BufferingMedia, 0% otherwise.

Change-Id: I9fb55a9317948ba9375291a57bbf100f186382a2
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
WMF: fix video frames' viewport.

It was not taken into account at all.

Change-Id: I4ce85aba214cb4d89dcd018b1616a2a38094b5a6
Reviewed-by: Christian Stromme <christian.stromme@digia.com>