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