Add support for OS.get_version_alias() on Android

[syntaxerror247]

This PR adds support for OS.get_version_alias() on Android. It returns android release string and sdk_version+incremental, for eg. 15 (SDK 35 build abc528-11988f) on my Android 15 device.

[syntaxerror247]

Should this method also return android version codename?
CC @Alex2782 @m4gr3d

[Alex2782]

My suggestion for get_version_alias would be to attach everything that is important for debugging (Copy System Info), including custom ROMs (props) --> src get_version

Example:

• Android 14 (SDK 34) (as shown in the Play Console)
• "+" - {more Informations: Custom ROM, etc.} (if available and relevant for issue reports)
• ... and what kind of information is useful for XR devices?

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Copy System Info on MacOS (for comparison, get_version_alias is used)

Godot v4.4.1.stable - macOS Sequoia (15.5.0) - Multi-window, 1 monitor - OpenGL 3 (Compatibility) - Apple M1 - Apple M1 (8 threads)

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The documentation would then have to be adapted accordingly:

https://docs.godotengine.org/en/4.4/classes/class_os.html#class-os-method-get-version-alias

Note: This method is only supported on Windows and macOS. On other operating systems, it returns the same value as get_version().

[Calinou]

Should this method also return android version codename?

Android versions since 10 don't have "marketing" codenames anymore, so I wouldn't add them. Internal codenames do exist (check Wikipedia), but they aren't used in branding material.

[Repiteo]

Thanks!