[automerger skipped] Make the MTU tests more realistic. am: b8c987ab8b -s ours

am skip reason: Merged-In I7f808249722924a0b1253e402c5580bb104afd8e with SHA-1 b95ca556db is already in history

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

Change-Id: Id6083e3e392055f821404b5982c4f0c0a4c4cf42
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>