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/SwitchWidgetController.java

@@ -65,9 +65,9 @@ public abstract class SwitchWidgetController {
     /**
      * Update the preference title associated with the switch.
      *
-     * @param isChecked whether the switch is currently checked
+     * @param title the preference title
      */
-    public abstract void updateTitle(boolean isChecked);
+    public abstract void setTitle(String title);
 
     /**
      * Start listening to switch toggling.
@@ -107,4 +107,4 @@ public abstract class SwitchWidgetController {
      * is {@code null}, then this preference will be enabled. Otherwise, it will be disabled.
      */
     public abstract void setDisabledByAdmin(EnforcedAdmin admin);
-}
+}