Merge "Set StateManager to BackgroundAppState if end gesture is NEW_TASK" into tm-qpr-dev am: 678abecaa0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21271704

Change-Id: I4dd09381389b8eb858ce2e2cf6a931c381ab9268
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>