Temporary root feature on USER releases

On USER releases, we need to get root privileges to handle
some things during DVT. This feature will be removed at the
start of MP phase.

Bug:FP4S-162
Test:
 1. fastboot oem enable-root
 2. fastboot oem disable-root

Change-Id: I2f81f6694542e25e73e0c645dfcab054342a024e
2 files changed