This removes Fretboard. The goal is to reduce cold startup costs associated with loading the experiments on the main thread. We currently have two experiments frameworks in use and should only require one.
* For #7254: Replace anko applyConstraintSet
* Anko has been deprecated and will not be continued
* Refactor ConstraintSet changes
* Replace applyConstraintSet in SearchLayouts
* Refactor HomeFragment ConstraintSet
* Define anonymous ConstraintSet
* Remove ConstraintSet prefix from PARENT_ID
* For #5694 & #6054: Adds preference screen for toolbar
* For #5694: Adds changing toolbar position functionality
* No issue: Updates telemetry links to actually work lol 😬
* For #6054: Adds toolbar position to core ping
* For #5577 - Adds button to add a new search engine
* For #5577 - Adds custom engine store
* For #5577 - Creates a custom SearchEngineProvider
* For #5577 - Gives the ability to delete search engines
* For #5577 - Adds the UI to add a custom search engine
* For #5577 - Adds form to create a custom search engine
* For #5577 - Adds the ability to add a custom search engine
* For #5577 - Adds the ability to delete custom search engines
* For #5577 - Selects the first element on the add custom search engine screen
* For #5577 - Prevents adding a search engine that already exists
* For #5577 - Styles the add search engine preference
* For #5577 - Makes the name check case-insensitive
* For #5577 - Fix bug where home screen doesnt see new search engines
* For #5577 - Moves Search URL validation to its own type
* For #5577 - Fixes linting errors
* For #5577 - Adds the ability to edit a custom search engine
* For #5577 - Allows the user to edit a serach engine even when it is the last item in the list
* For #5577 - Adds an undo snackbar when deleting a search engine
* For #5577 - Moves all of the strings to be translated
* For #5577 - Fixes bug when deleting your default search engine
* For #5577 - Puts adding search engines behind a feature flag
* For #5577 - Navigate to custom search engine SUMO article when tapping learn more
* For #5577 - Fixes nits
* For #5577 - Uses concept-fetch to validate search string
* For #5577 - Adds string resources for the cannot reach error state
- added engine hashmap so that we create each type of search provider once
(previously the providers to be added were checked by id, but since the id
is a UUID, it was always unique -> bug with multiple providers with same engine
but different id
- refactored update() flow so that it's more understandable + remove complex
method warning
