Merge changes I553daab5,I4f467864,I6f9deb17,Ic23977b5,I32dca835, ... into tm-qpr-dev

* changes:
  Revert "Lazy activation of A2DP or HFP"
  Revert "Remove OnModeChangedListener when cleanup"
  Revert "Suppress noisy intent when there is a fallback BT device"
  Revert "Refactor ActiveDeviceManager with isMediaMode"
  Revert "Make BT audio routing more resemble the Android S behavior"
  Revert "Call setActiveDevice(null) when disconnected"