Remove findIPv4DefaultRoute am: 70770a8b57 am: 8ab5513815 am: 3827353af6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2727695

Change-Id: I4f107ee3cdb284db5cf5bbe2ead41e677a8a77e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>