Move to CAF audio HAL in mainline CM now that they have caught up
to us.

Change-Id: Ia49aa687aeaae31167891fe066216c2e913553b6
Remove modified CAF audio HAL

Change-Id: Ib1e7d159cf74ce2175d02bd281db656d504440cb
dlx: Set BOARD_USES_SEPERATED_VOICE_SPEAKER

Change-Id: I403d3c5d4b15aa7d6a3bfabb1477f5af4329be93