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/BluetoothVisibilityTimeoutFragment.java

@@ -41,13 +41,14 @@ import com.android.settings.R;
 /**
  * Dialog fragment for setting the discoverability timeout.
  */
-final class BluetoothVisibilityTimeoutFragment extends DialogFragment
+public final class BluetoothVisibilityTimeoutFragment extends DialogFragment
         implements DialogInterface.OnClickListener {
 
     private final BluetoothDiscoverableEnabler mDiscoverableEnabler;
 
-    public BluetoothVisibilityTimeoutFragment(BluetoothDiscoverableEnabler enabler) {
-        mDiscoverableEnabler = enabler;
+    public BluetoothVisibilityTimeoutFragment() {
+        mDiscoverableEnabler = LocalBluetoothManager.getInstance(getActivity())
+                .getDiscoverableEnabler();
     }
 
     @Override