https://linear.app/comm/issue/ENG-10676/thumbhash-generation-fails-for-unprocessed-media

To reproduce try to send a png from media gallery that doesn't require processing on iOS.

If the image does not require processing then use filesystem uri for thumbnail generation and return the original uri (because it's compared later)..
If the image does require processing then use uri from image manipulator (it's filesystem uri) for thumbnail generation and return uri from image manipulator.

• send png that doesn't require processing
• send an image that does require processing
• send an image from a camera

and verify on the web there is a thumhash (blured image when loading) and in the logs the thumbhash is generated successfully