android 11.0 音量键功能开关(屏蔽音量加减功能)

在11.0的系统定制化开发中，要求屏蔽掉音量+ 音量-的功能，所以就要看是PhoneWindowManage.java中怎么处理的
首选看源码
路径:/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

@Override
     public long interceptKeyBeforeDispatching(IBinder focusedToken, KeyEvent event,
int policyFlags) {
   
    
    
final boolean keyguardOn = keyguardOn();
final int repeatCount = event.getRepeatCount();
final int metaState = event.getMetaState(