* For #5092 - Show a Snackbar with retry option if sharing to devices fails
ShareController will contain all the business logic for checking the result
status of the `share to device` operations. When this fails it will show a
snackbar which also offer the possibility to retry the just failed operation.
To allow this even in the event the user has closed the share fragment we'll
use a GlobalScope's coroutine.
Refactored out the TabsSharedCallback from ShareFragment because otherwise we
would have neede to sent through that the just failed operation. After the
refactor the ShareController is solely responsable for showing the right
snackbar and handling the retry actions.
* For #5092 - Refactor ShareControllerTest
* For #5092: Adds color theming of snackbars
Navigation between app fragments uses ShareTab as arguments. The newly used
SendTabUseCases uses TabData which is not Parcelable.
For minimal changes we'll keep both data classes and ShareController will know
how to map between the two.
Removed the `sessionId` property of ShareTab as it isn't needed anymore.
`ShareController` defines a contract with all possible `ShareFragment`'s
behavior changes and comes with a default implementation -
`DefaultShareController`.
It is to be delegated by all `ShareFragment`s contained Views' Interactors
following any user interactions.
David Walsh