Bump to new AndroidX packages

[jonathanpeppers]

Description of Change

We have new AndroidX packages produced from:

dotnet/android-libraries#247

After updating I ran into:

C:\src\maui\src\Compatibility\Core\src\Android\CollectionView\SelectableViewHolder.cs(44,25):
    error CS0618: 'RecyclerView.ViewHolder.AdapterPosition' is obsolete: 'deprecated' [C:\src\maui\src\Compatibility\Core\src\Compatibility-net6.csproj]
C:\src\maui\src\Compatibility\Core\src\Android\CollectionView\SelectableItemsViewAdapter.cs(70,9):
    error CS0618: 'RecyclerView.ViewHolder.AdapterPosition' is obsolete: 'deprecated' [C:\src\maui\src\Compatibility\Core\src\Compatibility-net6.csproj]
    0 Warning(s)
    2 Error(s)

AdapterPosition is indeed obsolete:

https://stackoverflow.com/a/63148812

It appears we can use BindingAdapterPosition, because the deprecated
code is basically:

@Deprecated
public final int getAdapterPosition() {
    return getBindingAdapterPosition();
}

Additions made

None

PR Checklist

• Targets the correct branch
• Tests are passing (or failures are unrelated)
• Targets a single property for a single control (or intertwined few properties)
• Adds the property to the appropriate interface
• Avoids any changes not essential to the handler property
• Adds the mapping to the PropertyMapper in the handler
• Adds the mapping method to the Android, iOS, and Standard aspects of the handler
• Implements the actual property updates (usually in extension methods in the Platform section of Core)
• Tags ported renderer methods with [PortHandler]
• Adds an example of the property to the sample project (MainPage)
• Adds the property to the stub class
• Implements basic property tests in DeviceTests