Surface Kotlin object companions on Compose class bindings via CompanionStatic rename

[Copilot]

Fixes #1467.

Problem

When a Kotlin class has an object Companion, the JVM emits two things on the outer class:

1. A nested type <Outer>.Companion
2. A public static final Companion Companion; field that holds the singleton

C# does not allow a nested type and a static member to share a name on the same class, so the binding generator silently drops the static field. Net effect: consumers can see the nested Companion type but cannot get an instance of it, leaving members like Color.Companion.Red, BlendMode.Companion.Clear, KeyboardOptions.Companion.Default, TextStyle.Companion.Default, FontWeight.Companion.Bold, Brush.Companion.HorizontalGradient(...), etc. unreachable from C# (they're only available via raw JNI).

Fix

Rename every *.Companion nested peer to CompanionStatic via a one-line wildcard XPath in the affected packages' Transforms/Metadata.xml:

<attr path="/api/package/class[substring(@name,string-length(@name)-9)='.Companion']" name="managedName">CompanionStatic</attr>

The collision is resolved at the type level so the consumer-facing property keeps its natural Kotlin/Java name. The generator now emits public static <Outer>.CompanionStatic Companion { get; } on every outer class whose Kotlin object Companion peer was previously colliding:

// before: not reachable from C# at all (field dropped due to name collision)
// after:
var red = Color.Companion.Red;
var clear = BlendMode.Companion.Clear;
var defaultKb = KeyboardOptions.Companion.Default;

CompanionStatic only appears as a return type in IntelliSense / decompiled signatures — it doesn't appear in normal call-site code.

This is the same wildcard pattern (and the same CompanionStatic rename) that this repo already uses in kotlin-stdlib, okio-jvm, aicore, and genai-prompt.

Interface companions are unaffected — the generator hoists those to top-level <Outer>Companion before this rename matches.

Packages updated

Package	New static Companion accessors
androidx.compose.foundation/foundation-android	24
androidx.compose.ui/ui-graphics-android	35
androidx.compose.ui/ui-text-android	38
Total	97

Each accessor returns the renamed <Outer>.CompanionStatic peer, so all of its members (constants, factory methods, savers, defaults) are reachable directly from C# via the natural <Outer>.Companion.Foo syntax.

ui-graphics-android bumps the NuGet revision to 1.11.2.3 (stacking on top of #1471's 1.11.2.2); ui-graphics-android/Transforms/Metadata.xml carries both #1471's SolidColor(long) constructor re-introduction and the new companion rename.

Verification

• ✅ All three packages build cleanly for both net9.0-android35.0 and net10.0-android36.0.
• ✅ dotnet cake --target=metadata-verify passes.
• ✅ PublicAPI.Unshipped.txt updated for the three packages with the new static Companion.get accessors plus the renamed nested CompanionStatic types and their members.
• ✅ Merged with main (picks up Bind stripped SolidColor(long) constructor in Compose UI.Graphics #1471) — both fixes coexist on ui-graphics-android.