Merge "Make the MTU tests more realistic." into udc-dev am: 94c75d8c1e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/23160898

Change-Id: I04ab4a54c24abffbbd5ebef30c386fc9190a0efa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>