Revert^3 Build only the needed run-test shards with "test.py -b -t XXX" am: 592c561dac am: 999e179683

Original change: https://android-review.googlesource.com/c/platform/art/+/2223148

Change-Id: I8b8a7857822689a6091fc5d4d04e8aef31913254
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>