Fix app module tests for Roboelectric

Currently, the app module test cases are passing on Espresso but they should also pass on Robolectric. Fix these below mentioned files to make sure that the tests pass on Robolectric.

You can run robolectric tests by following these steps: https://github.com/oppia/oppia-android/wiki/Oppia-Android-Testing#running-roboelectric-tests

Also, make sure that you assign yourself one task only at a time, which you can mention in the comments below.

Fixing test cases will need to introduce TextApplicationComponent. This can be seen here.

• AppVersionActivityTest (Assigned to @anandwana001 )
• CompletedStoryListActivityTest (Assigned to @anandwana001 )
• FAQListFragmentTest (Assigned to @Sarthak2601 )
• FAQSingleActivityTest (Assigned to @SayantanBanerjee16 )
• HelpFragmentTest (Assigned to @SayantanBanerjee16 )
• MyDownloadsFragmentTest(Assigned to @anandwana001 )
• HtmlParserTest (Assigned to @anandwana001 )
• StateFragmentTest (Fixed in #1630)
• AddProfileActivityTest (Assigned to @anandwana001 )
• AdminAuthActivityTest (Assigned to @anandwana001 )
• AdminPinActivityTest (Assigned to @anandwana001 )
• ProfilePictureActivityTest(Assigned to @anandwana001 )
• ProfileProgressFragmentTest (Assigned to @veena14cs )
• BindableAdapterTest (Assigned to @anandwana001 )
• SplashActivityTest (Fixed in #1397)
• StoryActivityTest (Assigned to @anandwana001 )
• StoryFragmentTest (Assigned to @anandwana001 )
• QuestionPlayerActivityTest (Assigned to @anandwana001)
• TopicTestActivityForStoryTest(Assigned to @anandwana001 )
• RevisionCardFragmentTest (Assigned to @anandwana001 )
• WalkthroughWelcomeFragmentTest(Assigned to @veena14cs )
• WalkthroughTopicListFragmentTest(Assigned to @anandwana001 )
• WalkthroughFinalFragmentTest (Assigned to @anandwana001 )
• WalkthroughActivityTest(Assigned to @anandwana001 )

[Sarthak2601]

@rt4914 Since we are going to take this issue under SLoP, can we freeze its contributions for now ? It might lead to confusion otherwise. @prayutsu Please wait on Rajat to reply. /cc- @anandwana001

[veena14cs]

@veena14cs MyDownloadsFragmentTest, ProfilePictureActivityTest and InputInteractionViewTestActivityTest is good. Could we mark them done on the list?

MyDownloadFragmentTest we cannot mark it as done. As there is still actual implementation has to be done. @rt4914 please confirm on this.

InputInteractionViewTestActivityTest we can mark it as done but just want to confirm with @nikitamarysolomanpvt and @BenHenning if we have to wait for number with units implementation and testcases.

We can mark ProfilePictureActivityTest as done.