Improve day separator rendering in the timeline.
Use Today, Yesterday, and the name of the day if less than 7 days and do not render the year for the current year.
Improve date format for the media viewer.
Rework how date and time are computed.
ActionListView: Time can take more space, so update the layout.
* Add `DateTimeObserver` to rebuild the room summary data when the date/time changes.
* Add time changed action too, to trigger when the user manually changes date/time
* Fix timezone issue by adding `TimezoneProvider`, fix tests
* Create test for `DateTimeObserver` usage in `RoomListDataSource`
* Create aRoomListRoomSummaryFactory function.
* Improve test by faking the lastMessageTimestampFormatter
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Co-authored-by: Benoit Marty <benoit@matrix.org>
* Upgrade the used JDK in the project to v21
* Use it for CI too
* Centralise java language version
* Fix deprecations, tests and lint issues
* Fix coverage taking into account `@Preview` annotated code.
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Co-authored-by: Benoit Marty <benoit@matrix.org>
* Create `RoomLastMessageFormatter` to produce readable room summaries.
* Add unit tests using Robolectric, fix bugs
* Add changelog
* Move `RoomLastMessageFormatter` back to `impl` module, allow it to receive an `EventTimelineItem` instead of `MessageContent`.
