Shift contributions to use Room DB (#3324)

* 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/*

app/src/main/AndroidManifest.xml

@@ -85,7 +85,7 @@
             android:name=".contributions.MainActivity"
             android:icon="@mipmap/ic_launcher"
             android:label="@string/app_name"
-            android:configChanges="screenSize|keyboard" />
+            android:configChanges="screenSize|keyboard|orientation" />
         <activity
             android:name=".settings.SettingsActivity"
             android:label="@string/title_activity_settings" />
@@ -157,18 +157,6 @@
                 android:name="android.accounts.AccountAuthenticator"
                 android:resource="@xml/authenticator" />
         </service>
-        <service
-            android:name=".contributions.ContributionsSyncService"
-            android:exported="true"
-            android:process=":sync">
-            <intent-filter>
-                <action android:name="android.content.SyncAdapter" />
-            </intent-filter>
-
-            <meta-data
-                android:name="android.content.SyncAdapter"
-                android:resource="@xml/contributions_sync_adapter" />
-        </service>
 
         <service
             android:name="org.acra.sender.SenderService"
@@ -184,12 +172,6 @@
                 android:name="android.support.FILE_PROVIDER_PATHS"
                 android:resource="@xml/provider_paths" />
         </provider>
-        <provider
-            android:name=".contributions.ContributionsContentProvider"
-            android:authorities="${applicationId}.contributions.contentprovider"
-            android:exported="false"
-            android:label="@string/provider_contributions"
-            android:syncable="true" />
 
         <provider
             android:name=".category.CategoryContentProvider"