Merge pull request #13 from adenexter/master

[qtmultimedia] Enable setting viewfinder resolution on camerabin backend...
Merge pull request #14 from adenexter/master

[qtmultimedia] Set audio encoding caps if settings are supplied.
[qtmultimedia] Only disable capture if extended permissions aren't available.

Allows the viewfinder to stay visible if there are sufficient
permissions irregardless of captureMode.