Merge "Add metadata generator tool for test spec metadata generation. Bug:...

Merge "Add metadata generator tool for test spec metadata generation. Bug: 296873595 Test: Manual test (use go test inside tools/metadata/testdata)" into main am: 4277d617 am: bb858bb6

Original change: https://android-review.googlesource.com/c/platform/build/+/2815214



Change-Id: I6a98fcc531609379c1c009b5d6579d71492085fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>