Changes needed to make Incoming calls work while fbe locked

+ All in-call components are marked as encryptionAware so Telecom can
bind to and use them.
+ Added null checks on cursors. When in FBE locked state,
non-encryption aware ContentProviders return null

Bug=26542121
Change-Id: Ia49536c957d3d721401c05bf638fdd9dd371a731