Revert "camera: Add flag to leave preview metadata alone"

This reverts commit a6e0b0ac42fc758ce6d26886c9a379e3e8fa840a.

Change-Id: I589caf34170d488ec75645c612d9c65f759eba2c
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2