Refactor onActivityResult() method to handle NullPointerExceptions

[Giulia9999]

This commit rewrites the onActivityResult() method in order to handle possible NullPointerExceptions that can occur when accessing data.getData(). The changes include adding try-catch blocks to handle exceptions gracefully and prevent app crashes. Additionally, comments have been added to the method to explain what each block of code is doing.

Description

Please include a summary of the change and which issue is fixed. List any dependencies that are required for this change. If there are any UI change, please include the screenshots also.

Fixes #1117

Type of change

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• [ x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• [ ] ./gradlew assembleDebug assembleRelease
• [ ] ./gradlew checkstyle

Checklist:

• [ ] My code follows the style guidelines of this project
• [ x] I have performed a self-review of my own code
• [ x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings

[codeclimate[bot]]

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[Swati4star]

There are merge conflicts. Can you fetch the latest and update the changes accordingly?