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 am: 0097ae81 am: 964f7e75

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



Change-Id: Id687feb611ef7a4b256f826e96f590ea8849c012
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>