This fixes the next set of trimmer warnings found via:

    <IsTrimmable>true</IsTrimmable>
    <EnableAotAnalyzer>true</EnableAotAnalyzer>

~~ JavaObjectExtensions ~~

`JavaCast<T>()` now requires `PublicConstructors` and
`NonPublicConstructors` because of `Activator.CreateInstance<T>()`.
This change bubbles up to various other types that have a
`Find*ById<T>()` method:

* `Activity`
* `Dialog`
* `FragmentManager`
* `View`
* `Window`

`GetInvokerType()` also has suppressions around `Assembly.GetType()`
and `Type.MakeGenericType()`. We track this for the future at:

dotnet#8724

~~ AndroidRuntime ~~

Update `[DynamicallyAccessedMembers]` based on changes to
`RegisterNativeMembers` in:

dotnet/java-interop@b8f6f88

~~ JNINativeWrapper ~~

`$(EnableAotAnalyzer)` found usage of `DynamicMethod`. Suppress for now,
as we track this for the future at:

dotnet#8724

~~ ResourceIdManager ~~

Usage of `Type.GetMethod ("UpdateIdValues")` leads to decoration of
`[ResourceDesignerAttribute]` with:

    [DynamicallyAccessedMembers (DynamicallyAccessedMemberTypes.PublicMethods)]
    public string FullName { get; set; }

I also had to suppress warnings around `Assembly.GetType()`. This
*should* be OK, as `Resource.designer.cs` is always in the "root
assembly" of Android application projects.

~~ JavaProxyThrowable ~~

Suppress warning around `StackFrame.GetMethod()`, we already handle
null return values and exceptions. The existing code appears to be
"best effort" to provide additional stack trace information.

~~ TypeManager ~~

Suppress warning around a call to `Type.GetType()` with a string
passed in from Java. Not really much we can do yet, except rely on
`MarkJavaObjects` trimmer step.

Likely also a problem for the future:

dotnet#8724

Code comments + FIXME

Doing it this way, keeps the warning present if someone was attempting to *use* NativeAOT, they still get the warning.

Code formatting