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

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

Change-Id: I5c255e27add50d64f04d1f602b35b566009daa07