Merge "cc: Make generated_headers configurable" into main am: 274b3c95

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3131597



Change-Id: Ia025399a37421c347c263f0534e8c3462548810e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>