am a7e508eb: am 18b1e79a: Bluetooth API: Do not allow apps to programmatically make BT discoverable.

Merge commit 'a7e508eb55c8f63ff43aea2374a2773893e69321'

* commit 'a7e508eb55c8f63ff43aea2374a2773893e69321':
  Bluetooth API: Do not allow apps to programmatically make BT discoverable.