android 连接USB按power键锁屏2声锁屏音

alps\frameworks\base\packages\Keyguard\src\com\android\keyguard\KeyguardViewMediator.java

#1384 行左右：

///M: [ALPS00827994] always to play sound for user to unlock keyguard

mSuppressNextLockSound = false;

改动：

///M: [ALPS00827994] always to play sound for user to unlock keyguard

if (authenticated) {

mSuppressNextLockSound = false;

} else {

mSuppressNextLockSound = true;

}