adb now defaults to libusb on macOS to address issue #270205252.
Previously, adb responded with a successful code when wireless pairing fails. Resolved this by returning a failure code (1) and user-facing error (error: protocol fault (couldn't read status message...)). echo $? now reports 1.
adb wait-for-disconnect is now operational for non-USB (wireless debugging).
Added new DbC interface for future support of ChromeOS over adb.