Merge changes I13495cad,I3a44c4c4,I15bff230,I8a492866,Ia7ffe34a

* changes:
  [Pair hearing devices] Add pair hearing device functionality
  [Pair hearing devices] Extract common behavior in BluetoothPairingDetail into Base class
  [Pair hearing devices] Add "Hearing devices" to show connected hearing devices
  [Pair hearing devices] Add "Saved devices" to show bonded but not connected hearing devices
  [Audio routing] Setup basic structure for audio routing page

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

@@ -42,6 +42,9 @@ import com.android.settingslib.bluetooth.BluetoothUtils.ErrorListener;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 import com.android.settingslib.bluetooth.LocalBluetoothManager.BluetoothManagerCallback;
 
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.FutureTask;
+
 /**
  * Utils is a helper class that contains constants for various
  * Android resource IDs, debug logging flags, and static methods
@@ -132,6 +135,24 @@ public final class Utils {
         return LocalBluetoothManager.getInstance(context, mOnInitCallback);
     }
 
+    /**
+     * Obtains a {@link LocalBluetoothManager}.
+     *
+     * To avoid StrictMode ThreadPolicy violation, will get it in another thread.
+     */
+    public static LocalBluetoothManager getLocalBluetoothManager(Context context) {
+        final FutureTask<LocalBluetoothManager> localBtManagerFutureTask = new FutureTask<>(
+                // Avoid StrictMode ThreadPolicy violation
+                () -> getLocalBtManager(context));
+        try {
+            localBtManagerFutureTask.run();
+            return localBtManagerFutureTask.get();
+        } catch (InterruptedException | ExecutionException e) {
+            Log.w(TAG, "Error getting LocalBluetoothManager.", e);
+            return null;
+        }
+    }
+
     public static String createRemoteName(Context context, BluetoothDevice device) {
         String mRemoteName = device != null ? device.getAlias() : null;