hlte: Audio update

 * Recreate mixer_paths.xml from Samsung's 4.4 release
 * Don't hack up all the path names, just use the platform API to
   override what the HAL expects normally.
 * Added extra paths such as USB audio, HFP, Listen, proxy, etc.
 * Add USB digital support for VOIP calls (need to merge AV path still)

Change-Id: I292a42fd99d61fa112e072c063f70f080f032d1b
hlte: Enable hardware keystore

 * Also a few SELinux related fixes.

Change-Id: Ibebbbdbf62d997d7d23c16e64eee3f645cf93c1b
turn off overlays

Change-Id: Ic02c9a755e013e1faf5a5138d239047202368ebe
hlte: Enable compressed VoIP

Change-Id: I15edc077b3be10a91bad6dd685a56b4b833ef8bb
hlte: Add permission for HDCP properties

Change-Id: Ie07ad73bc777fbb2ee007c72f875c0715463802c