Implement favorites on Android (#1236)

* - Modify database to store favorites
- Create entity
- Create DAO

* Allow users to add a favorite

* show favorite confirmation message when added

* Add empty case hint as part of recycler view.

* - Extracted adapters out from BookmarkActivity class
- Added logic to display empty hint in favorites adapter
- Updated new UI elements to be displayed correctly and with expected copy

* changed bookmark dialog copies to be generic

* Refactor: introduced savedSite as sealed class to model bookmarks and favorites
- be able to reuse dialog
- be able to reuse command logic
- be able to reuse same listeners
- decouple from entity data objects from databases in UI

* Show favorites as quick access items in SystemSearchActivity

* centering items in recyclerview

* drag-drop in System search activity

* show/hide context menu depending on user interactions:
- if user moves the item, hide menu

* edit/delete quickaccess items in SystemSearchActivity screen

* show quickAccess items in BrowserTabFragment

* browseractivity quick access items interactions

* New placeholder for favicons implemented as extension function

* calculate grid view items and margins so they appear centered

* integrate favorites in autocomplete

* scale favorite for drag and drop

* improve drag-drop UX

* Favicon manager refactor:
- handle apple touch events
- store them in persited store
- naming refactor

* favicon manager refactor to reduce logic outside favicon manager to decide the data source to use (temp or persist)

* Skip http request for favicons when user browsing in the same site

* show favorites when omnibar focused

* Fix 3 dots clickable are in for favorite/boomark items

* Quick access grid show title in 2 lines

Author: cmonfortep

app/build.gradle

@@ -141,6 +141,7 @@ dependencies {
     implementation AndroidX.appCompat
     implementation Google.android.material
     implementation AndroidX.constraintLayout
+    implementation AndroidX.recyclerView
     implementation AndroidX.swipeRefreshLayout
     implementation AndroidX.webkit
     implementation Square.okHttp3.okHttp