Merge "Move BitUtils, RingBuffer test to coretests" am: 6be4ebcb0a am: b65aea1772

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1754897

Change-Id: Iea499d304c2934a8778f02bb6c2f9c18c16fb6d3