fix(android): prevent crash while using multi template

Author: farfromrefug

src/ui-pager/index.android.ts

@@ -749,11 +749,10 @@ function initPagerRecyclerAdapter() {
             const template = owner._itemTemplatesInternal[type];
 
             let view: View = template.createView();
-
             if (!view && owner._itemViewLoader !== undefined) {
                 view = owner._itemViewLoader(template.key);
             }
-            const isNonSync = view === undefined;
+            const isNonSync = view === undefined || view === null;
             if (isNonSync || view instanceof ProxyViewContainer) {
                 const parentView = new ContentView();
                 parentView.id = 'pagerViewHolder';
@@ -881,6 +880,7 @@ function initPagerRecyclerAdapter() {
             const owner = this.owner ? this.owner.get() : null;
             if (owner) {
                 const template = owner._getItemTemplate(index);
+                console.log('getItemViewType', template, owner._itemTemplatesInternal.indexOf(template));
                 return owner._itemTemplatesInternal.indexOf(template);
             }
             return 0;