Release Lime3DS 2107

A Nintendo 3DS emulator based on Citra

Android: Major stability improvements for the Vulkan renderer (Thanks GPUCode!)
Enabled SPIR-V optimization, allowing for smaller compiled Vulkan shaders
Android: Added an overlay button to swap screens
    This button is disabled by default, and must be enabled in Overlay Options --> Toggle Controls
Android: The side drawer is now locked by default
Default system username is now "LIME3DS"
Default number of play coins has been updated to 300
Fixed the Exit hotkey not working correctly