Android 11.0 修复锁屏后连续按亮度键，System UI报错

frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
在 interceptKeyBeforeDispatching()

锁屏时拦截所有亮度调节事件

KeyguardManager keyguardManager = (KeyguardManager) ActivityThread.currentApplication().getSystemService(Context.KEYGUARD_SERVICE);
            if (keyguardManager.isKeyguardLocked()) return 0;

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