kernel, ksud, manager: Remove enhanced security feature

[aviraxp]

This feature does not work with tracepoint hook because setresuid is not even hooked for apps not in allowlist. It was invented when we still use task_fix_setuid LSM hook, but since it is inlined in oplus kernel and we switched to tracepoint hook, we don't have a reliable way to implement this feature without introducing side channels. Remove it and avoid confuse users.

[Copilot]

Pull request overview

This PR removes the enhanced_security feature from KernelSU due to its incompatibility with the current tracepoint hook implementation. The feature was designed for the old LSM hook-based approach but cannot be reliably implemented with tracepoint hooks without introducing security side channels, particularly because setresuid is not hooked for apps outside the allowlist.

• Removes the EnhancedSecurity feature enum and all related code from kernel, userspace daemon, and manager app
• Removes UI controls and localized strings for the enhanced security toggle across all supported languages
• Updates documentation to remove references to enhanced_security from the list of supported module features

Reviewed changes

Copilot reviewed 31 out of 31 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
kernel/feature.h	Removes KSU_FEATURE_ENHANCED_SECURITY enum value
kernel/setuid_hook.c	Removes enhanced security handler registration, security checks, and related static variables
userspace/ksud/src/feature.rs	Removes EnhancedSecurity variant from FeatureId enum and related match arms
manager/app/src/main/cpp/ksu.h	Removes KSU_FEATURE_ENHANCED_SECURITY enum definition
manager/app/src/main/cpp/ksu.cc	Removes set_enhanced_security_enabled() and is_enhanced_security_enabled() functions
manager/app/src/main/cpp/jni.cc	Removes JNI bindings for enhanced security native methods
manager/app/src/main/java/me/weishu/kernelsu/Natives.kt	Removes enhanced security native method declarations
manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Settings.kt	Removes enhanced security UI dropdown control and state management
manager/app/src/main/res/values*/strings.xml	Removes settings_enable_enhanced_security strings from 18 language resource files
website/docs/*/guide/module-config.md	Removes enhanced_security from supported features list in 8 localized documentation files

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