Merge "Asking the test to wait for launcher to commit the uninstall transaction before opening all apps." into tm-qpr-dev am: f905365e5a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21961037

Change-Id: Id12ff32a78dc4a6b53578473b94af9e3dfd33184
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>