camera: Re-add micromanagement of preview metadata

 * Some devices still have issues without this fix.

Change-Id: Iae2d4410086fb38bf7f9abeee62c05cae824d436
camera: bring back more of the preview metadata workaround.

Fixes issues with switching between FFC and back camera on some devices.

Change-Id: Ie2cef65263816b22e45513cfc639c32b48a49bec
Merge remote-tracking branch 'cm/cm-10.2' into HEAD