Changed method return type from List<string> to Dictionary<string, ListingType> to easily determine whether the file is a file or directory.

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Your branch is up-to-date with 'origin/master'.
#
# Changes to be committed:
#	modified:   AndroidLib/Classes/AndroidController/FileSystem.cs
#