Merge "Adding METADATA file to markdown and refreshing the current version" am: f94cfcb46c am: d2b9376831 am: 86e6f15004

Original change: https://android-review.googlesource.com/c/platform/external/markdown/+/2287593

Change-Id: I70fa0a134bb6c493e61ac3ef9fe1e5a711cde645
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>