[HB-6541][HB-6646] Fix Calling Deprecated Functions And Features in All Platforms

[SCastanedaMunoz]

Title

[HB-6541][HB6646] Fix Calling Deprecated Functions

Description

The Unity SDK has internal functions that call deprecated functions (and wrap them with warning-disable). ChartboostMediationAndroid.cs, for example. This feels like either it should be converted to use the non-deprecated versions, or the function making these calls should also be deprecated. IOS calls have been fixed so they do not trigger internal warnings. We have also enabled -warnaserror to detect this issues in the future.

Type of change

• [x] Bug fix (fixes an issue)
• [ ] New feature (adds functionality)
• [x] Refactor / Maintenance (refactoring code to be cleaner/easier to maintain)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules

[github-actions[bot]]

Test Results

1 tests   1 :heavy_check_mark:  3s :stopwatch: 1 suites  0 :zzz: 1 files    0 :x:

Results for commit 20ff73cb.