Add autofill service setting in managed profile

Previously, there was no way to change the autofill service of the
personal and managed profile independently. After 'uncloning' the
setting in ag/4666330, we now introduce a separate UI control
for each profile.

BUG: 38033559
Test: Tested manually by setting up a work profile and verifying that
the setting can be changed independently. Also verified that the
additional UI does not show without a managed profile.

Change-Id: I1c42fc4335bc319ca7f6fd1b7b10c781343ca248

src/com/android/settings/applications/defaultapps/DefaultAppPreferenceController.java

@@ -82,12 +82,16 @@ public abstract class DefaultAppPreferenceController extends AbstractPreferenceC
         final Intent settingIntent = getSettingIntent(app);
         if (settingIntent != null) {
             ((GearPreference) preference).setOnGearClickListener(
-                    p -> mContext.startActivity(settingIntent));
+                    p -> startActivity(settingIntent));
         } else {
             ((GearPreference) preference).setOnGearClickListener(null);
         }
     }
 
+    protected void startActivity(Intent intent) {
+        mContext.startActivity(intent);
+    }
+
     protected abstract DefaultAppInfo getDefaultAppInfo();
 
     /**