Support gallery messages (#6519)
* Support gallery messages
* Address review
* Remove unused function
* Fix indent
* Add "Gallery" message prefix
* Support galleries for image editing
* Fix tapping on a tile opens the last item
* Fix overflow count
* Add caption editing to gallery messages
* Use the new gallery string for prefix
* Lock sending galleries behind a feature flag
* Fix detekts
* Fix
* Ensure image edition is saved when navigating
* Fix sending media broken on edited gallery.
* Fix tests
* Order imports
* Remove unused parameters.
* Fix copyright header of new files.
* Fix Konsist test
* Extract new previews to a dedicated file.
* Sync strings
* Remove unused import
* Update screenshots
* Trigger CI
* Remove parameters with default value.
* More cleanup
* Restore sendAsFile behavior.
* Improve Preview.
* Improve Preview.
* Improve Preview.
* Fix gallery sending cancel and retry issue
* Ensure any previous job is cancelled.
* Fix issue in summary message
* Gallery feature is disabled by default.
* Kotlin convention
* Remove useless parenthesis
* Update screenshots
* Fix test
* List -> ImmutableList
* Remove useless code.
* Render formatted caption for attachment list.
* Replace set of Booleans by an enum
* Remove unused model for individual caption in a gallery Event.
* Fix tests
* Fix tests
* Rework MediaViewer entry point.
And ensure that the clicked image from the gallery is displayed first.
* Ensure gallery item can be click in the pinned message list
Improve the gallery item click handling code.
* Improve code and fix separator color
Closes #7101
* React on attachment item click
Improve code
* Improve code and support 0 items in gallery.
* Fix click on attachment item not rendering anything.
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Co-authored-by: Benoit Marty <benoitm@element.io>
Co-authored-by: Benoit Marty <benoit@matrix.org>
Co-authored-by: ElementBot <android@element.io>
