DeskClock: Fix upcoming alarm notification

* When the clock app is already open and an upcoming alarm is
  collapsed, moving the app to the background and later on clicking
  the "upcoming alarm" notification will show the outline + 2 elements
  of the expanded alarm but is missing the rest of the content.
* If you click around you'll notice that some parts are still reacting
  and are just hidden (you can still click them)
* We can fix it by making the "all elements are visible" state
  the one we start with
* The issue is caused by the animations not running and therefore never
  properly showing the items in onAnimationEnd

Fixes: https://gitlab.com/LineageOS/issues/android/-/issues/5572

Change-Id: Ib3ec0cc8f5a045e736506d064a3b4d011727078c