m7-common: use CAMCORDER_TX use case

Change-Id: I98df49c5347c839a2b12865de631187bc3572170
m7-common: libaudioamp: Add initialization function stubs

Change-Id: I34aad7e268dbb59edb0d6c224f5f95cc75e405fa
Merge "m7-common: use CAMCORDER_TX use case" into cm-10.2
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2