audio: cleanup files

Change-Id: I81fe1963297c8a6f2b4a52726da56e24ae10bcb8
add hall sensor keylayout file for turning screen off when cover is closed

Change-Id: I8acdcd17a6ca8954872e1c1767f1e3913247d61d
WIP: customize audio_policy

Change-Id: Idb845837678e90a7b9c4ef904c82a12bc92b6ed7
audio HAL: basic audio working w/o volume adjustment

TODO:
- split devices into "in" and "out" for better management
- add handling for audio_policy volume change notification

Change-Id: I8cd7ff3d02cf19f7b0c883e22e1a47d1b8b651ce
audio: add common bowser route file + change HAL to look for product.board vs. product.device

Change-Id: I55e9f587c8394b779c8ce26890b66314509d3a8e
bluetooth: drop source-basedpatchram and add vendor lib

Change-Id: I1eb6e497605887d2f7b60e9badee203f054cc1a0