[automerger skipped] Revert "DO NOT MERGE: Use prebuilts of the ART Module by...

[automerger skipped] Revert "DO NOT MERGE: Use prebuilts of the ART Module by default (reland)." am: 5031d7f8 am: 66387dea -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/15217854

Change-Id: I2ebe8a565775a5a6149606c74c7ce66c900cc9c4