Merge "cargo_embargo: improve the empty test detection check" into main am: 4814e85532

Original change: https://android-review.googlesource.com/c/platform/development/+/2806135

Change-Id: Ic41f4409e29b866e53d4a45d72197666f4f829c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>