Update overlays
Use source-built rild and libstagefrighthw
Audio config: Remove aic326x

We don't have the device or the codec.
Log before this change:
V/nvaudio_hw(154): Invalid card name tegraaic326x tegramax9808
V/nvaudio_hw(154): PCM config for invalid alsa_device

Change-Id: I18689b4c3d4bc96bca20f7bb5d1522d0eb3af16f
Omni doesn't need CMHW
init.x3.rc: no world permissions for torch
fstab.x3: allow auto fs detection
Configs cleanup and general tuning