* Part of #3127
* Added Room Dependency
* Shifted ContributionsDao to use RoomDB
* Save and Fetch contributions via RoomDAO
* Bugfixes, fixed test cases, injected schedulers for ContributionsPresenter
* removed stetho
* Fixed ReviewHelperTest cases
* Fixed test cases in DeleteHelperTest
* Fetch all contributions [TODO add pagination to use this, maybe later in a seperate PR]
* Update Schema false in AppDatabase
* removed parameter from fetchControbutions
* Added logs for fetch contributions
* Fixed test case ContributionsPresenter
* Added an autogenerate primary key, submit save contributions on executor
* fixed getItemAtPosition
* MainActivity Config changes +=orientation
* BugFixes
* Make AppDataBase Singleton
* Set _id as autogenerate primary key [replacing the previously used filename, seems like they are not unique]
* Replace Execxutor Utils with Subscribers on Singles in UploadService
* BugFix, Upload Progress
* Remove un-nescessary null check on contributions in ContributionsListAdapter
* removed ContributionsListFragment [not-implemeted]
* Review suggested changes
* removed un-nescessary null checks
* provide ContributionsDao
* Minor bug fixes
* wip
* delete existing contributions table (from the existing db) on upgrade
* remove un-nescessary null checks in test classes
* shifted media to be a local variable in ReviewHelperTest
* removed captured folder
* Dispose composite disposables in UploadService
* replaced size check with isEmpty ContributionsPresenter
* transform saveContributions to a Completable
* Addressed comments in review
* Typo in Contributions
* ReasonBuilderTest (create media object instead of mocking)
* Use global Gson object instead of creating a new one in Converters
* Provide Gson to Converters from the CommonsApplicationComponent
* use static method instead of field instead of static field to provide GSON in Converters
* Modified gitignore to exclude captures/*
