Merge "Fix signapk jar not found for prebuilt splits" am: f6f6c2f8

Original change: https://android-review.googlesource.com/c/platform/build/+/2165007



Change-Id: I1ddf2a3db02c2a04440d6bd94b5aef4aea1f75fe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>