Allow Bluetooth CAP_SYS_NICE

Bluetooth needs CAP_SYS_NICE in order to make important threads use RT
scheduling policy.

Bug 37518404

Test: Play Bluetooth audio, confirm RT priority in systrace
Change-Id: I388ef78d1aaf3f5fe1aa901b48d76c5c992acacc
Merged-In: I0ee55a2f2cfd80cbb066d9c034bb85d8d85ba470
1 file changed