* For #4281: small ToolbarMenu refactor
This makes it easier to see how items are ordered in the menuItems list
* For 4281: add QAB buttons to menu
* For 4281: removed menu back button per mocks
I double checked with UX, and we'll be relying on the hardware back button for its functionality
* For 4281: add content descriptions for bookmarking
* For 4281: updated BrowserToolbarController for new functionality
* For 4281: provided simple dependencies to browser controller
More complex changes will be in a following commit, for review readability
* For 4281: move toolbar controller dependencies up to BaseBrowserFragment
The functionality they control is being moved into the toolbar menu, which is shared by both normal tabs and custom ones
* For 4281: removed (now unused) code related to QAB
* For 4281: fix test compilation after QAB removal
Tests still need to be expanded to include added functionality
* For 4281: updated menu to show if url is bookmarked
This sloppy workaround is required because TwoStateButton requires that `isInPrimaryState` be a synchronous call, and checking whether or not the current site is bookmarked is quite slow (10-50 MS, in my tests). After days of work and many attempted solutions, this was the least abhorrent among them.
https://github.com/mozilla-mobile/android-components/issues/4915 was opened against AC to evaluate potentially supporting async `isInPrimaryState` functions.
https://github.com/mozilla-mobile/fenix/issues/6370 was opened against Fenix to investigate the unexpectedly slow call to `BookmarkStorage`.
* For 4281: update reader mode switch
* For 4281: selectively show/hide menu items
* For 4281: add reader mode appearance
* For 4281: update bookmark button when it is clicked
* For 4281: removed unused QAB code
* For 4281: removed QAB robot, updated UI tests
* For 4281: removed QuickActionSheet metrics
Since this behavior now lives in the toolbar, it is tracked via Event.BrowserMenuItemTapped
* For 4281: fixed lint errors
* For 4281: add new strings for buttons added to menu
This is necessary because the location change (from QAB to toolbar menu) could affect the grammar in some languages
* For 4281: remove outdated TODOs
* For 4281: removed QAB container
* For 4281: removed back button reference from UI test
This button no longer exists
* For 4821: Fixes a visual defect (extra padding on top of toolbar)
* For 4281: update copy on reader mode
* For 4281: fixed review nits
Mihai Adrian