chore: target Android 11

Author: dansiegel

src/Forms/Prism.Forms/Prism.Forms.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <RootNamespace>Prism</RootNamespace>
     <TargetFrameworks>netstandard2.0</TargetFrameworks>
-    <TargetFrameworks Condition="$(MSBuildRuntimeType) != 'Core'">$(TargetFrameworks);MonoAndroid13.0</TargetFrameworks>
+    <TargetFrameworks Condition="$(MSBuildRuntimeType) != 'Core'">$(TargetFrameworks);MonoAndroid11.0</TargetFrameworks>
     <Title>Prism for Xamarin.Forms</Title>
     <!-- Summary is not actually supported at this time. Including the summary for future support. -->
     <!--<Summary>Prism for Xamarin.Forms helps you more easily design and build rich, flexible, and easy to maintain Xamarin.Forms applications.</Summary>-->