[automerger skipped] Switch default execution strategy to racing for developer builds am: 524428a6 am: 7a02fa7b am: ae8d7801 am: 50d1196d -s ours am: 9d90cf76 -s ours

am skip reason: Change-Id I46bc3ff9c0d8d08e8f3aaa15076eb606737355af with SHA-1 524428a6 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/13292491

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I709773718aeee9d56aa32903f856eeb120f89dd1