Merge "Generate specific message for build flag declarations artifact" into...

Merge "Generate specific message for build flag declarations artifact" into main am: aae7c4a3 am: 3fa8274e

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3097877



Change-Id: Ic59565f14f69b5a45da04dfded50e7d04ad08e13
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>