chore(AutoComplete): Add textChanged examples

Author: tgpetrov

sdkAngular/app/autocomplete/events/autocomplete-events.component.html

@@ -3,7 +3,7 @@
     <!-- >> angular-autocomplete-events-html -->
     <RadAutoCompleteTextView [items]="dataItems" suggestMode="Suggest" displayMode="Tokens" 
                              (suggestionViewBecameVisible)="onSuggestionViewBecameVisible($event)"
-                             (didAutoComplete)="onDidAutoComplete($event)"
+                             (didAutoComplete)="onDidAutoComplete($event)" (textChanged)="onTextChanged($event)"
                              (tokenAdded)="onTokenAdded($event)" (tokenRemoved)="onTokenRemoved($event)"
                              (tokenSelected)="onTokenSelected($event)" (tokenDeselected)="onTokenDeselected($event)">
         <SuggestionView tkAutoCompleteSuggestionView suggestionViewHeight="300">

sdkAngular/app/autocomplete/events/autocomplete-events.component.ts

@@ -86,6 +86,10 @@ export class AutoCompleteEventsComponent {
         this.logEvent("DidAutoComplete with text: " + args.text);
     }
 
+    public onTextChanged(args) {
+        this.logEvent("Text Changed: " + args.text);
+    }
+
     public onSuggestionViewBecameVisible(args) {
         this.logEvent("Suggestion View Became Visible");
     }