Remove Profile Auto connection specific logic

Remove  profile auto connection specific logic as it is not implemented in
Bluetooth app
Disconnect PBAP server connection  when user initiates device level disconnection

Change-Id: I381ed96f6b57f414bbaccd694f55d2b992e330a4

src/com/android/settings/bluetooth/OppProfile.java

@@ -63,10 +63,6 @@ final class OppProfile implements LocalBluetoothProfile {
     public void setPreferred(BluetoothDevice device, boolean preferred) {
     }
 
-    public void setUnbonded(BluetoothDevice device) {
-        // Settings app doesn't handle OPP
-    }
-
     public boolean isProfileReady() {
         return true;
     }