Make a dummy view at the bottom of all apps

This is so that user can scroll all the way to bottom of all apps.
- updated tests to account for this new view

bug:340936636
Test manually:
before:https://drive.google.com/file/d/18mKMAedQh2uUOR2G4U_ZORIKP2tkRmEk/view?usp=sharing
after:https://drive.google.com/file/d/1UEl3kBfeInqxsgF2HwCfzOBEcsEqdbJ4/view?usp=sharing
Flag: NONE addingViewToBottomOfAllApps

Change-Id: Ib4b67a66cfc7ec2ba0dbbe211a241f244d204aaf