LLM custom image fixes

[ofreyssinet-ledger]

📝 Description

Fixes for the custom image tool:

• Back button behaviour in the first step: If the image is coming from the phone gallery, pressing the back button should reopen the gallery
• Prevent choosing another contrast if current contrast is loading
• Implement dithering → quality improvement of image, avoiding color banding
• Implement new ordering of pixels
  • in raw data result
  • in raw data result verifier (the last screen that reconstructs the image from the raw data)

❓ Context

• Impacted projects: ledger-live-mobile
• Linked resource(s): FAT-395 FAT-406

✅ Checklist

• Test coverage
• Atomic delivery
• No breaking changes

📸 Demo

🚀 Expectations to reach

Please make sure you follow these Important Steps.

Pull Requests must pass the CI and be internally validated in order to be merged.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
live-common-tools	✅ Ready (Inspect)	Visit Preview	Sep 16, 2022 at 0:08AM (UTC)

3 Ignored Deployments

Name	Status	Preview	Updated
ledger-live-github-bot	⬜️ Ignored (Inspect)		Sep 16, 2022 at 0:08AM (UTC)
native-ui-storybook	⬜️ Ignored (Inspect)		Sep 16, 2022 at 0:08AM (UTC)
react-ui-storybook	⬜️ Ignored (Inspect)		Sep 16, 2022 at 0:08AM (UTC)

[changeset-bot]

🦋 Changeset detected

Latest commit: 3f1f0fb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
live-mobile	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

@ofreyssinet-ledger

Screenshots: ✅

There are no changes in the screenshots for this PR. If this is expected, you are good to go.

[juan-cortes]

LGTM