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

在模擬器和裝置都已連線的情況下，使用 tns create js_app --js 以及提供的 tns run android --release ... --env.snapshot 命令重現此問題。首先比較每個目標的記錄，並追蹤負責安排 release 建置和 snapshot 產生的 CLI 進入點。完成條件是 release 建置和 snapshot 產生各自只執行一次。