Use SettingsLib's MainSwitchBar to replace SwitchBar in Settings.

To log Settings metrics, the MainSwitch extends MainSwitchBar and
replace the SwitchBar in SettingsActivity.

Bug: 175181773
Test: Run robotest and apply the widget in Settings and see the ui

Change-Id: I3add3702e9058ad9192b5172c7cf0e2ccfb55a70

src/com/android/settings/widget/GenericSwitchController.java

@@ -49,7 +49,7 @@ public class GenericSwitchController extends SwitchWidgetController implements
     }
 
     @Override
-    public void updateTitle(boolean isChecked) {
+    public void setTitle(String title) {
     }
 
     @Override