Merge "Asking the test to wait for launcher to commit the uninstall transaction before opening all apps." into tm-qpr-dev am: f905365e5a am: ff70e24a50

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

Change-Id: I52bf2e754f24cf086f1d0281dbfbc2cd5232a9ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>