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

Merge "Generate ninja files for api assembly and run ninja." am: 9327b9cb am: 14c84a2d am: ead8ef2f

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



Change-Id: I27d18cf1ebd9dd808b3b6b2f7cacfa267dfecf4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>