Disable Schema Export in Room Database Configuration

[adripo]

Description:

Problem:

The build process is currently emitting a warning due to the absence of a schema export directory for the Room database.
Details: https://github.com/Docile-Alligator/Infinity-For-Reddit/actions/runs/10067294236/job/27830465944#step:4:124

Solution:

Set exportSchema to false in the RedditDataRoomDatabase class to disable schema export, as it is not required for this project.

Testing:

• Verified that the schema export warning is resolved by setting exportSchema to false.
• Ensured that the application runs without any Room-related warnings.

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Checklist:

• Set exportSchema to false in RedditDataRoomDatabase.
• Verified resolution of the schema export warning.
• Ensured application runs smoothly without any Room-related warnings.

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Please review and merge the changes.