Add the visibility of net-utils-framework-common for cts-net am: 652aa2918b am: 3517c6d70a am: 3c1c253e01

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/net/+/11941178

Change-Id: I94dffba6bd2e0985f171340d495ade09972bdb42
tree: 545f5d93134d16d92c97fcd96ff331251ede8f23
  1. common/
  2. .gitignore
  3. PREUPLOAD.cfg