Move android data_dir to write-able location. references #4777 (#6095)
Move android data_dir to write-able location. references #4777 (#6095)

* Change user_data_dir to use the FilesDir (Android)

* Updated docs to reflect user_path change

* Added link

* Removed older reference, added missing _, reworded doc

* Made reference cleared

* Moved data_dir determination to a once off function

* Removed inappropriate expansion

* Revised version

* Updated the get_application_config function to make use of the user_data_dir on Android

inclement/kivy,matham/kivy,rnixx/kivy,kivy/kivy,kivy/kivy,matham/kivy,rnixx/kivy,matham/kivy,rnixx/kivy,akshayaurora/kivy,inclement/kivy,akshayaurora/kivy,kivy/kivy,inclement/kivy,matham/kivy,akshayaurora/kivy