Run mobile apps in a visible simulator or emulator with –visible

The once run command now supports a --visible option that opens a visible simulator or emulator window for mobile apps instead of only installing and launching in the background. Apple application targets automatically open the Simulator before installing and launching the app. Android binary targets can declare an emulator_device in their configuration so Once starts the specified Android Virtual Device before running the app. The default behavior is unchanged when --visible is not passed, and existing Android runs continue to use any already connected physical device or emulator. This option is also available to the agent run tool, so coding harnesses can request visible launches.