[TIMOB-1686] Android: Unable to have custom proxy properties whose names have uppercase first letters

Example:

var Foo = { bar: function () { return 'baz'; } };
Ti.UI.createWindow({ Foo: Foo, url: 'next.js' });

next.js:

var win = Ti.UI.currentWindow; 
var Foo = win.Foo;
Foo.bar();

This fails, because of the way that we treat proxy properties with uppercase first-letters as something special. It would work if we made the property to be named foo instead of Foo. It works in iOS with the uppercase, however. We should re-engineer our use of the uppercase first-letter of property names.