Add Settings support for Bluetooth Multi-A2DP and Multi-HFP

Test: Code compilation
Bug: 64767509

[NOTE: The cherry-pick removed changes to non-existent code and log
message description that doesn't apply here.]

Change-Id: Iee76286110ed87703d6a968f50273c22cd7c7086
Merged-In: Iee76286110ed87703d6a968f50273c22cd7c7086
(cherry picked from commit 4b796e5d2e)

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

@@ -76,6 +76,10 @@ public final class BluetoothSummaryUpdater extends SummaryUpdater implements Blu
     public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice, int bondState) {
     }
 
+    @Override
+    public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
+    }
+
     @Override
     public void register(boolean listening) {
         if (mBluetoothAdapter == null) {

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

@@ -276,6 +276,9 @@ public abstract class DeviceListPreferenceFragment extends
 
     public void onConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) { }
 
+    @Override
+    public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) { }
+
     /**
      * Return the key of the {@link PreferenceGroup} that contains the bluetooth devices
      */