Merge "Prevent enabling prebuilts by default for builds that don't support...

Merge "Prevent enabling prebuilts by default for builds that don't support them" am: 31860f66 am: ac600830

Original change: https://android-review.googlesource.com/c/platform/build/+/2513775



Change-Id: I4266087353d2c23f5a6fb7d95c52252b1ec76ecf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>