Bluetooth : fix for Settings crashes while rotating the screen.

- Add some codes preventing setting crash when rotating the screen
  when the Rename device or Visibility timeout dialogs are visible.

Change-Id: I5e142a5d869a0d5c91c6ace80093d09178d79558
Signed-off-by: jhtop.kim <jhtop.kim@samsung.com>

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

@@ -36,6 +36,8 @@ public final class LocalBluetoothManager {
     /** If a BT-related activity is in the foreground, this will be it. */
     private Context mForegroundActivity;
 
+    private BluetoothDiscoverableEnabler mDiscoverableEnabler;
+
     private final LocalBluetoothAdapter mLocalAdapter;
 
     private final CachedBluetoothDeviceManager mCachedDeviceManager;
@@ -60,6 +62,14 @@ public final class LocalBluetoothManager {
         return sInstance;
     }
 
+    public void setDiscoverableEnabler(BluetoothDiscoverableEnabler discoverableEnabler) {
+        mDiscoverableEnabler = discoverableEnabler;
+    }
+
+    public BluetoothDiscoverableEnabler getDiscoverableEnabler() {
+        return mDiscoverableEnabler;
+    }
+
     private LocalBluetoothManager(LocalBluetoothAdapter adapter, Context context) {
         mContext = context;
         mLocalAdapter = adapter;