fix: Android onLoad event when view width and height are zero

[thomas-coldwell]

Hey @DylanVann 👋

This PR aims to fix an existing issue with the onLoad event not firing on Android when the view style's width or height is zero as documented here #865. There is a similar PR #446 that was opened, but as mentioned in reviews this causes crashes due to the .override(Target.SIZE_ORIGINAL) method being applied to Glide. Instead, this PR follows the recommended way of getting the natural image dimensions as documented here in the Glide repo bumptech/glide#781 (comment).

The changes here include:

• Adds a second target of a Size class with the relevant decoder + transcoder to achieve this
• Aligns the onLoad method on Android to work in the same way iOS does - reporting the original natural image dimensions
• Some minor dev setup fixes to get the example app up and running

These changes are best tested with the AutoSize component in the example app - as you can see setting the width to zero still triggers the onLoad event and this example is then rendered correctly.

[Beamanator]

@DylanVann Is there any chance you can let us know your thoughts on this change? @thomas-coldwell and I would be happy to discuss with you if you have any questions / concerns about this update

[Beamanator]

Bump? 🙃