RenderScript was deprecate

In WorkerUtils.kt fun blurBitmap
Change code
```
rsContext = RenderScript.create(applicationContext, RenderScript.ContextType.DEBUG)
val inAlloc = Allocation.createFromBitmap(rsContext, bitmap)
val outAlloc = Allocation.createTyped(rsContext, inAlloc.type)
val theIntrinsic = ScriptIntrinsicBlur.create(rsContext, Element.U8_4(rsContext))
theIntrinsic.apply {
setRadius(10f)
theIntrinsic.setInput(inAlloc)
theIntrinsic.forEach(outAlloc)
}
outAlloc.copyTo(output)
```
to
```
var blurredBitmap: Bitmap? = Toolkit.blur(bitmap,25)
return blurredBitmap!!
```

Instruction to migrate
https://developer.android.com/guide/topics/renderscript/migrate

You just need to download the project, get the renderscript-toolkit module and add it to this Codelab project.
https://github.com/android/renderscript-intrinsics-replacement-toolkit

Start in WorkerUtils.kt at fun blurBitmap and read the linked RenderScript migration instructions. Add the renderscript-toolkit module from the referenced repository to this Codelab project, then update the blur implementation as described in the issue. Done means the project builds and blurBitmap uses the replacement toolkit instead of RenderScript.

Written by the indexing model from the issue text.