Hello,
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This issue is related to the android emulator do not start or start too slow.
Firstly, Please install an x86-based system image emulator, I notice your emulator's name is ARM, the virtual device will not be accelerated and will run slowly.
If you do not know how to create a x86-based system image emulator, please refer to this article: Managing Virtual Devices with the Android Device Manager step by step.
If you create an emulator base on x86-based system image, then you need to enable the Hardware acceleration for emulator.
Before debugging your application, please start your emulator firstly in the Android Device Manager(Launch the Android Device Manager from the Tools menu by clicking Tools > Android > Android Device Manager:), then run your application and debug it.
Best Regards,
Leon Lu
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