On Khronos dreams, even on Android which was adopted on version 7, is not worthwhile to display on the developer's dashboard.

https://developer.android.com/about/dashboards/

And good luck finding a Vulkan version beyond 1.0, with extensions that work properly across all mobile devices.

http://vulkan.gpuinfo.org/vulkansupport.php#android_devices

You get a spectrum all the way from 1.0.0 up to 1.0.66, with Vulkan 1.1 promised for Android P devices only.