Merge "Generate ninja files for api assembly and run ninja." am: 9327b9cb

Original change: https://android-review.googlesource.com/c/platform/build/+/2097635



Change-Id: Id4c83e7186e60145d2002128b1f482510a72d246
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>