Merge "Add new quickstep test for many tasks open at once." into sc-v2-dev am: 3c647ff30a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15992810

Change-Id: I1d405349dd20f7202c2ddf5353b3d9e91ea4d39f