Update QSDndEvents

* EnableZenModeDialog lives in SettingsLib, so add an
  interface to allow the SystemUI version to log ui events
* Add UIEvents that weren't ported over from MetricsLogger =>
  UiEventLogger

Test: atest DndTileTest EnableZenModeDialogTest
Test: check unbuffered log with
  adb shell cmd stats print-logs && adb logcat -s statsd:I | grep --line-buffered ' (90)'
Fixes: 206792037

Change-Id: I25c4f1b08a1793dcb24aabc6b31324f93b117240