[predictive-back-navigation] remove deprecated method calls in activities

[lunaticare]

[predictive-back-navigation] remove deprecated method calls in activities

Summary:

Test Plan:

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Stack created with Sapling. Best reviewed with ReviewStack.

• [predictive-back-navigation] enable for the whole app #773
• [predictive-back-navigation] disable callback when not needed #772
• -> [predictive-back-navigation] remove deprecated method calls in activities #771
• [predictive-back-navigation] replace back handler for ScreenActivity #770
• Make Gradlew executable #769

[what-the-diff]

PR Summary

• Introduction of App Level Back Button Control in ScreenActivity
  Implemented a new functionality setUpBackHandler() in ScreenActivity.kt, this will provide us with a precise control over the behavior of the back button in the entire app.

• Modification in ScreenActivity's Existing Functions

  • Adjusted onBackPressed() function for implementing a more controlled navigation experience on the back button press.
  • The onToolbarCreated() function was modified for better compatibility with the new back button navigation process.

• Changes in EditRepositoryFragment
  Adjusted the onBackPressed() function to improve the navigation experience when editing the repositories.

• Adjustment in RepositoryFragment
  The onDeleteConfirm() function has been refined. It now better handles the situations after the user confirms to delete a repository.

• Updation in SettingsFragment
  Modified the toolbar.setNavigationOnClickListener() function to ensure the back button in toolbar behaves correctly during setting adjustments.

• Updates to File Permissions
  Changed the access permissions for gradlew file from mode 100644 to 100755. This update is done to solve potential issues regarding file access rights and execution permissions.

[Iamlooker]

Have you tested these changes?

[lunaticare]

Have you tested these changes?

Yes. I will add a couple more commits on top, but each pull request should be fully working, i.e. is does not break back navigation. I will add a test plan in the final PR.