When manage_build builds for Android, BuildPlayerOptions.subtarget was
always set to StandaloneBuildSubtarget.Player (0). On Android, subtarget
maps to MobileTextureSubtarget (texture compression format). Building
with subtarget=0 on Unity 6000+ triggers a confirmed Unity bug (IN-102413)
that forces PVRTC texture compression — ignoring the project's Player
Settings (ASTC/ETC2).
Worse: setting subtarget persists the value in EditorUserBuildSettings,
overwriting whatever the user configured in Build Settings.
Fix: only set subtarget for Standalone platforms (Windows/OSX/Linux),
where it distinguishes Server vs Player builds. For all other platforms
(Android, iOS, tvOS, WebGL, etc.), leave subtarget at its default so
Unity respects the project's Player Settings.
Fixes#1212
BuildTarget.VisionOS does not exist in Unity 2022.3.0 - 2022.3.17 or
2023.1.x, so UNITY_2022_3_OR_NEWER causes CS0117 compile errors on
those versions. Tighten the guard to UNITY_2023_2_OR_NEWER, where the
enum is guaranteed to exist.
Beast-ofcourse