Merge "Iterative improvement to the taskbar stash animation." into tm-qpr-dev...

Merge "Iterative improvement to the taskbar stash animation." into tm-qpr-dev am: 554c431d am: 195e0c9e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21226020



Change-Id: I615be595332472eb9aaf6df0607b00e5550d124a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>