This procedure sometimes works for me and sometimes doesn’t; have not yet found a reason why it doesn’t work.
1. On phone start AndroidWear and start USB debugging.
2. On watch go to Settings, Developer options and start ADB debugging/Debug over Bluetooth.
3. Connect phone to PC via USB, wait for any Windows auto-start prompt and cancel it then wait a few seconds longer.
4. In Android Studio, Terminal enter
adb forward tcp:4444 localabstract:/adb-hub adb connect 127.0.0.1:4444
Sometimes second command does not work (‘unable to connect’): wait a while then try again. If connects can confirm with ‘adb devices’.
Note: For my set-up prefix command with ‘c:\users\username\appdata\local\android\sdk\platform-tools\’ until this added into path.