Where Does One Find A Copy of the ContextService.apk? For My Specific Model?

[Pcrcol]

So I rooted by Galaxy S5 SM-G900V running 4.4.4.

And now everytime I open gallery or do certain things, It tells me "Unfortunately, Context Service has stopped working."

I read on a thread you can Rename or replace the ContextService.apk file located under /system/priv-app to fix it So where do I get a non corrupt copy? And how do I access the /system/priv-app area? Connect to a pc?

Also, wouldnt replacing with a non corrupt version be more important that renaming it and no longer working? Do we not need it?

 

[Pcrcol]

So I downloaded Root Explorer app to find that "/system/priv-app area" and nothing. I can not find any "system" file or Priv-app area.

Thanks