[Meta] Composify the tabs tray

[jonalmeida]

To avoid breaking everything at once, we can incrementally introduce Compose into our tabs tray by following this order of converting the code:

1. Make TabsFeature return a list of TabSessionState instead a different mapped data class android-components#11012
   • Update TabsFeature to pass in TabSessionState instead of tabstray's Tab.
2. Move Tabs Tray to compose: Individual tab viewholders: ListViewHolder. #21894
   • Individual tab viewholders: GridViewHolder, ListViewHolder.
3. Move Tabs Tray to compose: Gesture support #21896
   • Gesture support - how to support swiping to delete by horizontal and vertical directions, see TabsTouchHelper
4. Move Tabs Tray to compose: Inactive tab list - see InactiveTabsAdapter and it's viewholders. #21897
   • Inactive tab list - see InactiveTabsAdapter and it's viewholders.
5. Move Tabs Tray to compose: Group lists  #21898
   • Group lists - this is where gesture support can help us too with vertical swiping.
6. Move Tabs Tray to compose: Browser lists  #21899
   • Browser lists - see NormalBrowserTrayList, PrivateBrowserTrayList, AbstractBrowserTrayList.
7. Move Tabs Tray to compose: Synced Tabs list  #21900
   • Synced Tabs list - SyncedTabsTrayLayout, SyncedTabsAdapter
   • We can do this async; doesn't have to wait for the normal/private tab list.
8. Move Tabs Tray to compose: Normal/Private page list  #21901
   • Normal/Private page list - NormalBrowserPageViewHolder, PrivateBrowserPageViewHolder, SyncedTabsPageViewHolder
9. Move Tabs Tray to compose: Individual tab viewholders: GridViewHolder #25891
10. Move Tabs Tray to compose: TabsTrayFragment to use ModalBottomSheetLayout #26131
11. ⚠️ Profile tabs tray performance before/after a full Compose re-write OR during each incremental step.
    • Reading reference: https://engineering.premise.com/measuring-render-performance-with-jetpack-compose-c0bf5814933
    • There is an interesting analysis on perf for Compose in Pocket here: For #21854 - Split the big ComposeView in 3 smaller ones #22067
12. [UITests] Track ignored tests from when migrating tabs tray to compose #26087
13. Move Tabs Tray to Compose: Tab Reordering #26476

(file individual tickets and link them here)

┆Issue is synchronized with this Jira Task

[jonalmeida]

Moved to bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1810775

Change performed by the Move to Bugzilla add-on.