Merge "add congestion control test to CTS" into udc-dev am: 190965164f am: a6839c7899

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/23117205

Change-Id: I1d9b439495e71310c3864d3dedd8d16fab225064
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>