[TIMOB-23119] Change auto width behaviour to FILL for text entry components

Following up with TIMOB-20406, there are some other UI components that would benefit from changing their auto width behaviour to FILL to prevent them from being invisible otherwise. While a developer will probably always set the text of a label, he would not for text entry components. If these auto width to SIZE this will make them invisible, which is confusing. And if he does it is unlikely that he would want the width to fit the content in these cases. Text entry components: * TextArea * TextField * SearchBar Full list of behaviour for components: http://docs.appcelerator.com/platform/latest/#!/guide/Layouts,_Positioning,_and_the_View_Hierarchy-section-29004895_Layouts,Positioning,andtheViewHierarchy-AutoSizeBehaviors