Add a source_module_name to android_app am: efa14657

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2982635



Change-Id: I86d01156c103b3fc08f105d2890c9882f5fdeb57
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>