snapshot generation is executed twice if you have both emulator and device attached

Environment

• CLI: 6.2.1

To Reproduce

1. tns create js_app --js
2. tns run android --release --key-store-path {} --key-store-password {} --key-store-alias {} --key-store-alias-password {} --env.uglify --env.snapshot
3. In the logs you can see that snapshot generation and build are executed twice. Expected they should be executed only once.

Note: it is reproducible with --release build in general, not only with snapshot

在模拟器和设备都已连接的情况下，使用 tns create js_app --js 以及提供的 tns run android --release ... --env.snapshot 命令复现该问题。首先比较每个目标的日志，并跟踪负责安排 release 构建和 snapshot 生成的 CLI 入口点。完成标准是 release 构建和 snapshot 生成各自只运行一次。