Improved AndroidPlatformStrategy & Factory, to avoid memory leak of Context

Used to store reference to TextView (which is a subclass of View, which contains a reference to the Context)
This leads to a possible Memory Leak

Now, Factory only takes in one Object, and AndroidPlatformStrategy uses a method to 'reach' the TextView.

This 'method' based access of the TextView (defined in OutputTextViewActivity.java ) allows for non-memory-leaking of the Context.