[Bug]Accessibility Service shown as disabled even when it is already enabled

[jpgjm]

Describe the bug

After granting accessibility permission and using the app for a while,
the UI incorrectly shows the accessibility service as disabled,
even though it is still enabled in system settings.

screen-20260527-140552.mp4

Root cause

isAccessibilityEnabled() is only re-checked on ON_RESUME.
If the Compose state is reset (e.g. activity recreation, memory pressure),
the stale value (false) is never corrected until the user leaves and returns.

Suggested fix

1. Use AccessibilityManager.getEnabledAccessibilityServiceList()
   instead of string-parsing Settings.Secure — more reliable API.

2. Add a ContentObserver on ENABLED_ACCESSIBILITY_SERVICES
   to detect changes in real-time, not only on resume.