Merge "Load starlark files from soong" am: 3e0836e8 am: 145dc54c

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2424850



Change-Id: Ie4bf7367476b0146ec51d7131b56eb71ce24a1fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>