Return profile state disconnected when not yet bound to service.

Bug: 4007080

There is a another bug open to handle service object being null
and a connect / disconnect call being made.

Change-Id: I30f6923323532b5756338b350ec4ce0e1a31d1ff

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

@@ -133,6 +133,8 @@ final class HeadsetProfile implements LocalBluetoothProfile {
     }
 
     public int getConnectionStatus(BluetoothDevice device) {
+        if (mService == null) return BluetoothProfile.STATE_DISCONNECTED;
+
         List<BluetoothDevice> deviceList = mService.getConnectedDevices();
 
         return !deviceList.isEmpty() && deviceList.get(0).equals(device)