Remove findIPv4DefaultRoute am: 70770a8b57 am: 8ab5513815

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

Change-Id: If0644735315dd89895a582d3358a74cec7a83689
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>