How to depend on interfaces rather than concrete implementations and optionally modularize features

MySdk.kt

// BAD: Direct dependency on Glide
class ImageLoader {
    private val glide = Glide.with(context)

    fun load(url: String, imageView: ImageView) {
        glide.load(url).into(imageView)
    }
}

// GOOD: Depend on an abstraction
interface ImageLoader {
    fun load(url: String, imageView: ImageView)
}

class GlideImageLoader(private val context: Context) : ImageLoader {
    override fun load(url: String, imageView: ImageView) {
        Glide.with(context).load(url).into(imageView)
    }
}

// SDK users can now provide their own implementation
class MySdk(private val imageLoader: ImageLoader) {
    fun display(url: String, imageView: ImageView) {
        imageLoader.load(url, imageView)
    }
}