Fix BTHS is still in pairing list after BTHS is connected

This CL uses onProfileConnectionStateChanged() to handle
the case that bonded device is connected in pairing list.

1. Finish BluetoothPairingDetail page if the bonded device is connected
and selected.
2. Remove the devices in BluetoothPairingDetail page if the device is
connected.

Bug: 142519901
Test: make -j42 RunSettingsRoboTests
Change-Id: I51a9f2ebc0b491edb8ea026ff62ec20ae91eee1d

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

@@ -35,9 +35,10 @@ import com.android.settingslib.bluetooth.BluetoothDeviceFilter;
 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
-import java.util.WeakHashMap;
+import java.util.List;
 
 /**
  * Parent class for settings fragments that contain a list of Bluetooth
@@ -72,6 +73,7 @@ public abstract class DeviceListPreferenceFragment extends
 
     final HashMap<CachedBluetoothDevice, BluetoothDevicePreference> mDevicePreferenceMap =
             new HashMap<>();
+    final List<BluetoothDevice> mSelectedList = new ArrayList<>();
 
     boolean mShowDevicesWithoutNames;
 
@@ -154,6 +156,7 @@ public abstract class DeviceListPreferenceFragment extends
             BluetoothDevicePreference btPreference = (BluetoothDevicePreference) preference;
             CachedBluetoothDevice device = btPreference.getCachedDevice();
             mSelectedDevice = device.getDevice();
+            mSelectedList.add(mSelectedDevice);
             onDevicePreferenceClick(btPreference);
             return true;
         }