You can find hidden files on an Android phone with the help of a file manager. There are plenty file managers on the market that you can use to see the hidden files on the emulated partition.
To gain complete access, the Samsung Galaxy S6 needs to be rooted. You can use the AutoRoot package for that.
WARNING : AutoRoot will void your warranty and trip KNOX protection. Be extra careful especially if you want to do this.
As suggestions to access the files use ES File Explorer, Root Explorer or Astro File Manager.