Revert^3 Build only the needed run-test shards with "test.py -b -t XXX" am: 592c561dac am: 999e179683 am: a2d3ef6f94 am: ae9599ae73

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

Change-Id: Icf8205da1e9fcb40f1b8c7f5e03608b67f0e82aa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>