docs: private void setLastAlarmTime(long millisBeforeNow) {
          SharedPreferences.Editor editor = mPrefs.edit();
          editor.putLong(constructKey(LAST_ALARM_ELAPSED_TIME_SUFFIX),
              SystemClock.elapsedRealtime() - millisBeforeNow);
          editor.putLong(constructKey(LAST_ALARM_CLOCK_TIME_SUFFIX),
              System.currentTimeMillis() - millisBeforeNow);
          editor.apply();
      }