Don't clobber existing history entries. am: ec2fbb7159

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2103107

Change-Id: Ife76bf9b3c91250a9ab40df176703b487a7796f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>