Merge "Bump SDK Extension version to 3" into tm-dev am: 7dca200ee6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/17823872

Change-Id: Id73492a78c30b6b3237ff97493e352b062a7016a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>