[automerger skipped] Write per-partition build_flags.json am: 73bb4e1e -s ours

am skip reason: Merged-In I708c37f9b1216b4283886c98cacaf66bfcd28143 with SHA-1 f4cc08e1 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/27235336



Change-Id: I210d2b2abfe7b630645e6e0f493ed22a51b6504d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>