Add application scope for fire-and-forget jobs (#926)

* Add application scope for fire-and-forget jobs

* Update app/src/main/java/com/example/android/architecture/blueprints/todoapp/data/DefaultTaskRepository.kt

Co-authored-by: Manuel Vivo <manuelvicnt@gmail.com>

* Update app/src/main/java/com/example/android/architecture/blueprints/todoapp/data/DefaultTaskRepository.kt

Co-authored-by: Manuel Vivo <manuelvicnt@gmail.com>

* Fix imports

* Change createTest to return task ID

* Replace provides with binds for simpler Hilt config

* Add dispatcher and scope to test dependencies, improve param names

* Fix failing test, fix spotless

* Catch exceptions and update comments for send tasks job

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Co-authored-by: Manuel Vivo <manuelvicnt@gmail.com>