Merge "cpp codegen redesign, unit test support" am: 99d4a49d am: 6f1c3fe8...

Merge "cpp codegen redesign, unit test support" am: 99d4a49d am: 6f1c3fe8 am: 06aefcba am: e9eb1360 am: 124ea224 am: 0e8f1fc1

Original change: https://android-review.googlesource.com/c/platform/build/+/2642133



Change-Id: Id51d5b88ef18423c602d70d7c7e1ea2e25dafb8d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>