Merge "Improve NetworkCallback declared methods toString" into main am: 5289382f04

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3125533

Change-Id: I9df68442168a577ef530ae941c2e74691cd81ffe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>