Fix camera direction getting out of sync

Not doing this causes the tracked camera direction to become out of
sync. Fix this by writing the direction using mSettingsManager instead
of overwriting mCameraFacing.

Also only overwrite the direction when we actually get something from
the Intent, so the default behavior of opening the last opened camera
continues to work.

Issue: FP2A10-175
Fixes: 5b6496d82 ("Support capture intent from Google Assistant")
Change-Id: I90a99e241f020916937c442356d7b1850728fa77
1 file changed