Fix some typos in documentation.

Fix some spelling and grammatical errors in comments that show up in Qt documentation. No changes to code.

Change-Id: Ieb7be17bd1d50751f00620f7ac28d09355856ac0
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>
Android: QVideoProbe support for camera

QMediaVideoProbeControl sublclass added to capture service to make
QVideoProbe work with Android camera.

[ChangeLog][QtMultimedia][Android] QVideoProbe support for camera

Task-number: QTBUG-35416
Change-Id: I14d0a0e8abd14ee8f577e2901b976b8ed46eb320
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
Mark tst_qcamerabackend test as insignificant on Mac OS X

It has failed 6 times during qt5.git stable integrations since September 2013

See also QTBUG-36040

Change-Id: I6abd5b2723d2346a4831ab28fa040c14615148b0
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>