Merge "Add Singleton class to collect and validate test spec metadata." into...

Merge "Add Singleton class to collect and validate test spec metadata." into main am: 29766f4d am: eb7cc75c am: 8c16b083

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2824671



Change-Id: I961412838b7c109a5e3ca0b63b70010dfcd239c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>