samples fixes

samples/ControlGallery/Views/CollectionView/InfiniteScrollPlayground.razor

@@ -3,23 +3,21 @@
 @page "/collectionviewplayground/infinite-scroll"
 
 <ContentPage Title="Infinite scroll">
-    <StackLayout>
-        <CollectionView ItemsSource="_intItems"
-                        RemainingItemsThreshold="2"
-                        OnRemainingItemsThresholdReached="LoadItems">
-            <Header>
-                <Label Text="Scroll to load more items." />
-            </Header>
+    <CollectionView ItemsSource="_intItems"
+                    RemainingItemsThreshold="2"
+                    OnRemainingItemsThresholdReached="LoadItems">
+        <Header>
+            <Label Text="Scroll to load more items." />
+        </Header>
 
-            <ItemTemplate>
-                <Item Value="@context" />
-            </ItemTemplate>
+        <ItemTemplate>
+            <Item Value="@context" />
+        </ItemTemplate>
 
-            <Footer>
-                <ActivityIndicator IsRunning="_loading" />
-            </Footer>
-        </CollectionView>
-    </StackLayout>
+        <Footer>
+            <ActivityIndicator IsRunning="_loading" />
+        </Footer>
+    </CollectionView>
 </ContentPage>
 
 @code {

samples/HybridAuthSample/Platforms/Android/MainActivity.cs

@@ -7,7 +7,7 @@ using Android.OS;
 
 namespace HybridAuthSample
 {
-    [Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize)]
+    [Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, Exported = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize)]
     public class MainActivity : MauiAppCompatActivity
     {
         protected override void OnCreate(Bundle savedInstanceState)

src/Microsoft.MobileBlazorBindings.Authentication/Platforms/Android/WebAuthenticationCallbackActivity.cs

@@ -10,7 +10,7 @@ namespace Microsoft.MobileBlazorBindings.Authentication
     /// <summary>
     /// Handles callback for authentication on Android.
     /// </summary>
-    [Activity(NoHistory = true, LaunchMode = LaunchMode.SingleTop)]
+    [Activity(NoHistory = true, LaunchMode = LaunchMode.SingleTop, Exported = true)]
     [IntentFilter(new[] { Intent.ActionView }, Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable }, DataScheme = "app")]
     public class WebAuthenticationCallbackActivity : Maui.Authentication.WebAuthenticatorCallbackActivity
     {