Update Angular module and component names

Angular flavor of this does not currently work. This changes the names to match what is in the documentation. Is this enough to fix Angular version? I don't know.

- Change component name from  'WebViewExt' to 'AWebView'
- Change module name from 'WebViewExtModule' to 'AWebViewModule'

Author: sublime392

src/webview/angular/index.ts

@@ -1,13 +1,13 @@
 import { NgModule } from '@angular/core';
 import { NativeScriptCommonModule, isKnownView, registerElement } from '@nativescript/angular';
 
-const webviewElementName = 'WebViewExt';
+const webviewElementName = 'AWebView';
 
 if (!isKnownView(webviewElementName)) {
-    registerElement(webviewElementName, () => require('@nativescript-community/ui-webview').WebViewExt);
+    registerElement(webviewElementName, () => require('@nativescript-community/ui-webview').AWebView);
 }
 
 @NgModule()
-export class WebViewExtModule {
+export class AWebViewModule {
     imports: [NativeScriptCommonModule];
 }