Added splash_screen_test

[Sandesh-03]

What kind of change does this PR introduce?

Unit Test

Issue Number:

Fixes #2145

Did you add tests for your changes?

Yes

Snapshots/Videos:

If relevant, did you update the documentation?

Summary

I wanted to get familiar with testing in Flutter. It was a good opportunity.

Does this PR introduce a breaking change?

No

Other information

Have you read the contributing guide?

Yes

[github-actions]

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[dhanagopu]

Can you review this PR ? @AdityaBirangal @anwersayeed

[Dante291]

@Sandesh-03 remove this file from the codebase as this will be duplicate then.

[Cioppolo14]

@Sandesh-03 Please fix the failing tests.

[palisadoes]

1. This has to be closed. You have moved the location of the original test file which is not in keeping with the existing structure of the testing regimen.
2. Make your changes to the original file and resubmit