Move Launcher classes shared between tests and prod in a separate lib am: e8ee34ad8a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21083963

Change-Id: I458dcd290168c185fc9a7c6974529c6cb08bf81d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>