Merge "Disable prebuilt_build_tools for non-x86 targets" am: 76e661382e am: 6a20a31b15 am: 8f26b16e27

Original change: https://android-review.googlesource.com/c/platform/prebuilts/build-tools/+/1423268

Change-Id: Ibca65120f6334876552e78e3a89d9db8f24be7ec