Fix binder leakage when turning off Bluetooth

* In current design, Bluetooth AdapterState stops all BR/EDR
  profiles' service and triggers onServiceDisconnected callback to
  all binder clients before BluetoothManagerService invokes
  onBluetoothStateChange(false), which means unbind service
  would never be called in framework.
* Do unbind service when onServiceDisconnected is invoked.
* Move profile binder logic to BluetoothProfileConnector except:
  - BluetoothHeadset: its binder logic is in BluetoothManagerService
  - BluetoothPbap: it has an individual ServiceListener

Bug: 129037442
Bug: 129437895
Test: Bluetooth ON/OFF stress test.
      adb shell dumpsys activity services | egrep "com.android.bluetooth"
      to check whether AppBindRecord for com.android.bluetooth grows

Merged-In: Id0d85866d386962b94d2d966f0a864b1da165d13
Change-Id: Id0d85866d386962b94d2d966f0a864b1da165d13