[automerger skipped] Refactor metadata tool to support metadata generation for...

[automerger skipped] Refactor metadata tool to support metadata generation for different rules. am: f101d2b7 -s ours

am skip reason: Merged-In I881fd76213ec78001f9e12ed2fbc860d1503a364 with SHA-1 a96ce322 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/25503199



Change-Id: Icb5ec0291b55061ebfd589f57d8138366e223ca5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>