Give tethering bluetooth privilege permission

Permisssion of PanService#setBluetoothTethering is change from
BLUETOOTH_ADMIN to BLUETOOTH_PRIVILEGED.
Tethering service need bluetooth privilege permission to enable
bluetooth tethering.

Bug: 146045934
Test: on/off bluetooth tethering
Merged-In: Ib87a5d5a5bb49390aa55e52713bb3539d4a52348
Change-Id: Ib87a5d5a5bb49390aa55e52713bb3539d4a52348
2 files changed