chore(deps): update dependency xamarin.androidx.media to 1.7.1.2 (#4300)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [Xamarin.AndroidX.Media](https://aka.ms/android-libraries)
([source](https://redirect.github.com/xamarin/AndroidX)) | `1.7.1` →
`1.7.1.2` |
![age](https://developer.mend.io/api/mc/badges/age/nuget/Xamarin.AndroidX.Media/1.7.1.2?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/Xamarin.AndroidX.Media/1.7.1/1.7.1.2?slim=true)
|

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integrationtests/IntegrationTests.Android/IntegrationTests.Android.csproj

@@ -100,7 +100,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Xamarin.Android.Support.Design" Version="28.0.0.3" />
-    <PackageReference Include="Xamarin.AndroidX.Media" Version="1.7.1" />
+    <PackageReference Include="Xamarin.AndroidX.Media" Version="1.7.1.2" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\ReactiveUI.AndroidX\ReactiveUI.AndroidX.csproj">