Divider only shows when both panel and "Search with" are visible

* For #5574 - Part 1: Port TabAction.SaveTabGroup to TabSessionInteractor and SessionControlController. (#6651)

- Introduces the TabSessionInteractor, SessionControlInteractor and SessionControlController classes.
- Removes the TabAction.SaveTabGroup.

* For #5574 - Part 2: Port TabAction.PrivateBrowsingLearnMore to TabSessionInteractor and SessionControlController (#6651)

* For #5574 - Part 3: Port TabAction.ShareTabs to TabSessionInteractor and SessionControlController (#6651)

* For #5574 - Part 4: Remove unused TabAction.Share and TabItemMenu (#6651)

In #2205, the tab overflow button was removed which would have shown the
TabItemMenu when clicked. So, we can remove TabItemMenu since it is not
used and as a result, we can also remove TabAction.Share since there are
no consumers.

* For #5574 - Part 5: Port TabAction.PlayMedia and TabAction.PauseMedia to TabSessionInteractor and SessionControlController (#6651)

* For #5574 - Part 6: Port TabAction.Select to TabSessionInteractor and SessionControlController (#6651)

* For #5574 - Part 7: Port Onboarding.Finish to OnboardingInteractor and SessionControlController (#6651)

* For #5574 - Part 8: Port TabAction.Close and TabAction.CloseAll to TabSessionInteractor and SessionControlController (#6651)

- Removes TabAction

* For #5574 - Part 9: Port CollectionAction.Delete to CollectionInteractor and SessionControlController (#6651)

* For #5574 - Part 10: Port CollectionAction.ShareTabs to CollectionInteractor and SessionControlController (#6651)

* For #5574 - Part 11: Port CollectionAction.AddTab and CollectionAction.Rename to CollectionInteractor and SessionControlController (#6651)

* For #5574 - Part 12: Port CollectionAction.RemoveTab to CollectionInteractor and SessionControlController (#6651)

* For #5574 - Part 13: Port CollectionAction.OpenTab to CollectionInteractor and SessionControlController (#6651)

* For #5574 - Part 14: Port CollectionAction.CloseTabs to CollectionInteractor and SessionControlController (#6651)

* For #5574 - Part 15: Introduce a HomeFragmentStore (#6651)

- We will hook up the HomeFragmentStore in later parts.
- Removes List<Tab>.toSessionBundle(context: Context) since it is unused.

* For #5574 - Part 16: Port CollectionAction.Collapse and CollectionAction.Expand to CollectionInteractor and SessionControlController (#6651)

- We assume the store is hooked up to the SessionControlController in this part,
but this work will be done in a later part.
- Removes CollectionAction.

* For #5574 - Part 20: Remove the architecture module. (#6651)

* For #5574 - Part 17:  Remove duplicate subscribeToTabCollections in BrowserFragment.kt (#6651)

There is a duplicate call of subscribeToTabCollections() in both HomeFragment and BrowserFragment.
In this patch, we remove the call in BrowserFragment to avoid passing the HomeFragmentStore to
BrowserFragment in order to dispatch the CollectionsChange event.

* For #5574 - Part 18: Delete SessionControlComponent and fix TabCollection and Tab imports (#6651)

* For #5574 - Part 19: Use the new HomeFragmentStore in the HomeFragment (#6651)

- Renames SessionControlUIView to SessionControlView

* For #5574 - Part 21: Fix white screen on home fragment (#6651)

* For #5574 - Part 22: Fix formatting in SessionControlInteractor and replace See with @see in SessionControlController (#6651)

* For #5574 - Part 23: Move to metrics.track call to the beginning of handleCollectionRemoveTab (#6651)

This ensures that the metrics.track will be called immediately before the tab is removed from the collection.

* For #5574 - Part 24: Use the sessionManager getter in SessionControlController (#6651)

* For #5574 - Part 25: Use mapNotNull in List<Tab>.toSessionBundle (#6651)

* For #5574 - Part 26: Simplify closeTab and closeAllTabs functions by assigning a deletionJob constant (#6651)

* For #5574 - Part 27: Replace listOf() with emptyList() in removeAllTabsWithUndo (#6651)

* For #5574 - Part 28: Replace the Context parameter with the HomeActivity in SessionControlController (#6651)

* For #5574 - Part 29: Add test for HomeFragmentStore, DefaultSessionControlController and SessionControlInteractor (#6651)

* For #5574 - Removes running CI against the architecture debug build varient

Co-authored-by: Severin Rudie <Baron-Severin@users.noreply.github.com>

Co-authored-by: Severin Rudie <Baron-Severin@users.noreply.github.com>

Co-authored-by: Severin Rudie <Baron-Severin@users.noreply.github.com>

Co-authored-by: Severin Rudie <Baron-Severin@users.noreply.github.com>

Co-authored-by: Severin <Baron-Severin@users.noreply.github.com>

With this patch Fennec users, who upgrade to Fenix, will not lose Firefox launcher icons they
have added to their home screen.

A side effect of this change is that the launcher entry for existing Fenix users may disappear
from the home screen for existing Firefox Preview users and they will have to re-add it.
Since the Preview audience is more accepting of breaking changes and since that group is
way smaller than the millions of Fennec users, I think that this is an acceptable breaking
change. I looked into supporting multiple launcher entries in parallel, but that got quite
complex with multiple build types and multiple manifest files. Especially if we decide
to keep a Firefox Preview build around (e.g. org.mozilla.fenix) then it would be good to
unify on a single launcher and do that as early as possible.

* No issue: update release docs and add Beta release steps

Updated bookmarking method

Fixed flaky tests

Added wait to create bookmark

- Initiates a download
- Verifies prompt
- Verifies notification in notification shade