t6-common: camera parameter override

Change-Id: I5b17031aa5fcdf1fb9bfe52d46108529c3cde1f1
t6-common: only use one preferred density

Change-Id: I980557ec7a3be9a9a6c785b8f738009274c1335e
t6-common: bring up wifi for cm-12.0

Change-Id: I21b51e6fd95b5f39a82f51536c3989ad5c225c60