Add support for "Added in <SDK-ext> <version>" am: eed6dd8800 am: b3269255ad

Original change: https://android-review.googlesource.com/c/platform/external/dokka/+/2327957

Change-Id: I56a4e48c2b9f177e631789e67be92e81a996d149
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>