holiday: set bluetooth permissions earlier in init

* No longer a need for hci-kickstart hack.
* A2DP music audio works.
* Bluetooth calling works.
* Massive battery drain while BT is on is completely gone.

Change-Id: I4412272c79301dfa4e8d5f159433de03d124c0b3
holiday: add bluetooth tethering config option

Change-Id: Iff7f2d3ea094f38a0f55e987d48212d0a1540717