* For #11171 - Removes feature flag for the new tab tray
* For #11171 - Removes all tab references from homeFragment
* For #11171 - Fixes unit tests
* For #11171 - Gets UI tests to compile and HomeScreenTest to pass
* For #11171 - Fixes `deleteMultipleSelectionTest`
* For #11171 - Fixes `openHistoryItemInNewPrivateTabTest`
* For #11171 - Fixes `openHistoryInPrivateTabTest`
* For #11171 - Fixes `openHistoryInNewTabTest`
* For #11171 - Fixes `openNewPrivateTabTest`
* For #11171 - Fixes tabbedBrowsingTests
* For #11171 - Fixes SettingsPrivacyTest
* For #11171 - Fixes TopSitesTest
* For #11171 - Fixes lint errors
* Ignore
* For #1063 - Adds feature flag and pref for new tab tray
* For #1063 - Swaps add tab to tab tray button when newTabTray is enabled
* For #1063 - Creates hidden preference to use new tab tray
* For #1063 - Hides tabs on home screen when setting is enabled
* For #1063 - Navigate to new tab tray from browser with setting enabled
* For #1063 - Fixes regression where we dont show the new tab message with no tabs and no collections
* For #1063 - Fixes crash when toggling to private mode on the home screen
* For #1063 - combines both settings. Cleans up lint errors
ekager