Fix for getPosition after seek

When starting playback with a seek pending
(calling seek before start) there is a brief period
when the audioplayer returns an incorrect position (zero)

This is caused by that mSeeking is set to false
before the position in the audioplayer actually is updated.

Change-Id: Iaec355c8fdfe589d9b826d20c2531034f2b4e6fb
Merge "Fix for getPosition after seek" into du44