Merge "Fix an issue where tasks moving to front would collapse the stack."...

Merge "Fix an issue where tasks moving to front would collapse the stack." into tm-dev am: 13a28fff am: 668dddcd am: 406e3725

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18876919



Change-Id: I851a08a68dfe2b0ccf0f59c63bf5de22fe0555ec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>