Merge "Add a CompatChange flag to enable platform backend" am: 62503cfef1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2452427

Change-Id: I9591abf64328d91a470bccb9816ad19bf09672f1
Signed-off-by: Automerger Merge Worker <[email protected]>