[automerger skipped] Clear IPv4 offload rules when tethering stopped am: 01785d7eff -s ours

am skip reason: Merged-In Id505a3deb277bbe0f44403234d8ca8bbf01eec80 with SHA-1 a6e7869646 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/15114803

Change-Id: I077e68f63688457fb293e7debb24aadf063f1be0