Xcode 13 compatible and warnings fixes

[badrinathvm]

This PR fixes all the warnings and made Xode13 compatible.

Issue Link :link:

• Enhancement
• Does it break any existing functionality? - None

Goals of this PR :tada:

• Why is the change important? : Making sure project compiles with latest Xcode
• What does this fix? : Warnings and made compatible with Xcode 13
• How far has it been tested? : Regressed Unit & UI Tests

How Has This Been Tested :mag:

Please let us know if you have tested your PR and if we need to reproduce the issues. Also, please let us know if we need any relevant information for running the tests.

• User Interface Testing
• Application Testing

Test Configuration :space_invader:

• Xcode version: 13.0
• Device/Simulator: iPhone 12
• iOS version || MacOSX version: 15.0

Things to check on :dart:

• [ ] My Pull Request code follows the coding standards and styles of the project
• [ ] I have worked on unit tests and reviewed my code to the best of my ability
• [ ] I have used comments to make other coders understand my code better
• [ ] My changes are good to go without any warnings
• [ ] I have added unit tests both for the happy and sad path
• [ ] All of my unit tests pass successfully before pushing the PR
• [ ] I have made sure all dependent downstream changes impacted by my PR are working