Merge "Add proguard rules for TcUtils" am: c060c2dd46 am: 284ffa2bfa am: fada4b7405 am: 95ebc89722

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1955580

Change-Id: Ic99aced517867b3a0df0c150ebb3355a1f1e2bcb