Merge changes I0ab00c03,Ib4e83e36,I72b17568,If4ea3575,If63bf25f, ... into ub-launcher3-qt-dev
* changes:
Clear all button should not be swipable
Use custom drawable for Recents Go thumbnails (1/2)
Add clear all view that scales off device height
Ensure recents scrolled to first task in landscape
Enable landscape mode for Recents Go.
Remove old recyclerview layout logic
Calculate task height directly off portrait height
Fix task adapter notify merge conflict
Move clear all to recycler view (2/2)
Move clear all to recycler view (1/2)
Only switch item animator on content fill if needed
Fix NPE and make getTask return Optional
Fix ViewTreeObserver crash on Recents Go
Fix snapshots not updating on app => overview.
Fix views not being visible on Recents Go.
Smarter task laying out based off onMeasure
Change layout size to be dependent on device size
Update Go recents visibility based off adapter
Animate content fill animation to Recents Go
Animate to bottom view in app => overview
Differentiate empty UI from default in recents Go
Add task content animation property
Fix transition progress not applying to drawables
Change layout anim from Animation => Animator
Add drawable for default thumbnail for Recents Go