adb install -r 

~/Downloads/service-tools_2.1(develop*) » adb install -r /Users/vtaduy/Downloads/Wear\ OS\ by\ Google\ Smartwatch_v2.49.0.387790360.gms.apk
Performing Streamed Install
Success

失败的结果应该是我们本地手机不知道国际版不支持GG service