ast template parser: Minor reordering of visitor methods to group by importance / like-minded methods instead of just alphabetically.
ast template parser: Minor reordering of visitor methods to group by importance / like-minded methods instead of just alphabetically.

Also, update ElementFilter to just use IdentifyTemplateAstVisitor, and remove redundant methods.

PiperOrigin-RevId: 173163164

matanlurey/angular,kevmoo/angular,chalin/angular2,chalin/angular2,kevmoo/angular,angulardart/angular,angulardart/angular,angulardart/angular,matanlurey/angular,matanlurey/angular,kevmoo/angular,chalin/angular2