DO NOT MERGE Revert "Fix gray out previously connected device preference issue"

This reverts commit 95abf59af4.

Reason for revert: Crashes settings (b/110075201)

Bug: 110075201
Change-Id: Ie6ea94e0891754f18576bd21447b64410d2fd23a

tests/robotests/src/com/android/settings/connecteddevice/PreviouslyConnectedDevicePreferenceControllerTest.java

@@ -21,7 +21,6 @@ import android.content.pm.PackageManager;
 import android.support.v7.preference.Preference;
 
 import com.android.settings.bluetooth.BluetoothDeviceUpdater;
-import com.android.settings.connecteddevice.dock.DockUpdater;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 
@@ -47,8 +46,6 @@ public class PreviouslyConnectedDevicePreferenceControllerTest {
     @Mock
     private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
     @Mock
-    private DockUpdater mDockUpdater;
-    @Mock
     private PackageManager mPackageManager;
 
     private Context mContext;
@@ -64,7 +61,6 @@ public class PreviouslyConnectedDevicePreferenceControllerTest {
         mPreConnectedDeviceController =
                 new PreviouslyConnectedDevicePreferenceController(mContext, KEY);
         mPreConnectedDeviceController.setBluetoothDeviceUpdater(mBluetoothDeviceUpdater);
-        mPreConnectedDeviceController.setSavedDockUpdater(mDockUpdater);
 
         mPreference = new Preference(mContext);
         mPreConnectedDeviceController.setPreference(mPreference);
@@ -75,12 +71,10 @@ public class PreviouslyConnectedDevicePreferenceControllerTest {
         // register the callback in onStart()
         mPreConnectedDeviceController.onStart();
         verify(mBluetoothDeviceUpdater).registerCallback();
-        verify(mDockUpdater).registerCallback();
 
         // unregister the callback in onStop()
         mPreConnectedDeviceController.onStop();
         verify(mBluetoothDeviceUpdater).unregisterCallback();
-        verify(mDockUpdater).unregisterCallback();
     }
 
     @Test