[AllApps] NORMAL <-> ALL_APPS motion clean fixes for AOSP

- Avoids drawing on scrim when headerProtection is not enabled.
- Defines a default staggered animation for all apps scrim and content per S design guidelines

[preview attached to bug]

Bug: 191259805
Test: visual
Change-Id: I0d625c9f0caba158ff58f12a39b4f18aedead84b