rhine: add MDP idle notifier permissions

Change-Id: If92d3fee5bf4feb9c651e0d9e8268476a5943980
rhine: Enable audio offload

Change-Id: Ia25f7d9da1d2f11c6ac86600f31abe1f2004920a
rhine: Remove unnecessary hwcomposer flags

Change-Id: I682aff2d07407bfca285eb89fffcb0d7619f0c55