Wraps UNITY_2023_1_OR_NEWER directive around BaseGameActivityClass

[sl4m]

Description

Currently, the class fails to compile in versions of Unity below 2023. Wrapping the UNITY_2023_1_OR_NEWER directive around BaseGameActivityClass solves the problem.

Testing

It compiles.

Type of Change

Place an x the applicable box:

• [ x] Bug fix. Add the issue # below if applicable.
• New feature. A non-breaking change which adds functionality.
• Other, such as a build process or documentation change.

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[a-maurice]

In general this seems fine to me. Just curious, was this a warning as an error type problem (Unused variable)? Cause that's the only issue I can potentially see.

[sl4m]

@a-maurice It was an error, so we needed to fix it on our end.