gg: Android specific asset load in create_image function

[ArtemkaKun]

Before, loading an image on Android must be handled separately from the create_image function, and the created image doesn't contain a path value.

This PR unifies the create_image function to automatically handle the loading of images on Android (with the same code that was used manually) and implements setup of path value for images loaded on Android.

🤖 Generated by Copilot at f0bca41

This pull request improves the image loading functionality of the gg module for android platforms. It adds support for reading images from apk assets using the android_asset prefix, and streamlines the logic for initializing the Sokol backend in vlib/gg/image.c.v.

🤖 Generated by Copilot at f0bca41

• Add support for loading images from apk assets on android (link)
• Refactor the code for handling Sokol initialization (link, link)

[ArtemkaKun]

I introduced fix to V UI to fix CI fail there -> vlang/ui#538

[JalonSolov]

Looks like all the errors boil down to:

src/picture.v:99:14: error: `dd` is immutable, declare it with `mut` to make it mutable
   97 |         } else if mut pic.ui.dd is DrawDeviceContext {
   98 |             dd := pic.ui.dd
   99 |             if img := dd.create_image(pic.path) {
      |                       ~~
  100 |                 pic.image = img
  101 |                 u.resource_cache[pic.path] = pic.image

[spytheman]

Good work.