Call noteAppRestrictionChanged when toggling restrictions/exemptions

This is to log the reasons for restriction level change and force stop

Bug: 333882527
Test: statsd_testdrive 863
      Toggle battery restrictions manually for an app and verify logging
      of reason
      atest BatteryOptimizeUtilsTest
Change-Id: Ifcc99efc1b6acc5a992f7d952967210b07319f2e

src/com/android/settings/applications/appinfo/AppButtonsPreferenceController.java

@@ -558,6 +558,11 @@ public class AppButtonsPreferenceController extends BasePreferenceController imp
         ActivityManager am = (ActivityManager) mActivity.getSystemService(
                 Context.ACTIVITY_SERVICE);
         Log.d(TAG, "Stopping package " + pkgName);
+        if (android.app.Flags.appRestrictionsApi()) {
+            am.noteAppRestrictionEnabled(pkgName, mAppEntry.info.uid,
+                    ActivityManager.RESTRICTION_LEVEL_FORCE_STOPPED, true,
+                    ActivityManager.RESTRICTION_REASON_USER, "settings", 0L);
+        }
         am.forceStopPackage(pkgName);
         int userId = UserHandle.getUserId(mAppEntry.info.uid);
         mState.invalidatePackage(pkgName, userId);