When `ENABLE_VK_DEBUGGER` is defined, VkDevice needs to be declared in order to build. Bug: b/148401179 Change-Id: If35f3a1425ec0d739750d632305a625c7e12b721 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/43432Reviewed-by: Antonio Maiorano <amaiorano@google.com> Tested-by: Ben Clayton <bclayton@google.com>