fstab: add check on userdata partition

Change-Id: Ia08a3ff9bb4177315cc51dcb2a4dec609fd4edd5
(cherry picked from commit 61f4c2e114f490aa78ac8601849f63b059cb126e)
m8: Enable offloaded visualizer

 * Since addition of the visualizer tile, devices need to use
   the offloaded visualizer in order for compress offload to
   function. Enable the plugin.
 * Also enable the ultra high quality resampler

Change-Id: I1ad85cb178a93794bc427dfeecfea8e0b04c3537
(cherry picked from commit dfdb547ca1763616a22096752443e890bbff70ea)
m8: Enable offload for PCM/AV streaming

 * Also cleanup useless audio policy entries

Change-Id: I1c2e8b4f86a8b16f807896bc3bfa96acd43e1c0a
(cherry picked from commit 2ebc469d9c9b24a13422af579c64396501951ef2)
overlay: route calls to mute mic through AudioManager

Change-Id: Ic92978f9647e510f9bcff6b1d8e9e3efbefdd010
(cherry picked from commit 78f73802e6aa33d181bd36da0874347f63bdaba7)
m8: Cleanup audio policy

 * Fix noise when playing notifications too

Change-Id: Ibe152597cd82afd6035c1b59b1517dc922242928
(cherry picked from commit 9f496ebf9783f1e09887baaa8209410beb619411)
m8: Remote submix only accepts 48KHz

Change-Id: I13d706f1f8510227cc4350cff8339166a8545a45
(cherry picked from commit 858a82853c70e3b7801fb1cf958b5a9ed8326a1b)