Allow to exempt from entitlement check

To exempt from entitlement check, caller need to hold TETHER_PRIVILEGED
permission.

Bug: 141256482
Test: atest TetheringTests

Change-Id: I2eb37f5e92f5f5150a7fb7c25b945e28704d27a0
Merged-In: I2eb37f5e92f5f5150a7fb7c25b945e28704d27a0
5 files changed