This is NetworkStack RRO demo APK.
This APK is pre-built by MediaTek internal.

WHAT IT DOES?
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This is a demo APK. Becuase of the built in target of NetworkStack is very complicated, maybe
NetworkStackNext, InprocessNetworkStack, GoogleNetworkStack... 
So there is apk is only override for target:NetworkStackNext.apk for example. 

HOW IT WAS BUILT?
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It is build in /vender/app

HOW TO USE IT?
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This is a RRO APK, so it will auto reply after built in.