m7-common: update wifi SELinux config

Change-Id: If572d18b7b3089a9833be6e8550df9d3b344f1d9
m7-common: Fix deprecated USB syntax

Change-Id: I07fabab95f136e2d056f5b3cb3b6a8ecc467e10f
m7-common: Richer SD card permissions

Change-Id: I327c1a235a90453c32075c80f15c40f061c5c9eb