Reorganize pillarbox-demo-tv structure and add missing examples

[MGaetan89]

Pull request

Description

Following the work done in #393 for pillarbox-demo, the same changes have been applied to pillarbox-demo-tv.
This PR also moved the ExamplesViewModel to pillarbox-demo-shared, so it can be reused in pillarbox-demo-tv to show the missing protected examples.
Finally, it fixes some Lint warnings:

• Convert icons to WebP
• Disable monochrome launcher icon in the TV app, as it is not supported there

Changes made

Self-explanatory.

Checklist

• Your branch has been rebased onto the main branch.
• APIs have been properly documented (if relevant).
• The documentation has been updated (if relevant).
• New unit tests have been written (if relevant).
• The demo has been updated (if relevant).
• All pull request status checks pass.