[TrimmableTypeMap] Fix constructor UCO generation

[Copilot]

Generated trimmable typemap constructor UCO wrappers were activating peers through the (IntPtr, JniHandleOwnership) constructor even when Java invoked a managed constructor with parameters. This skipped JNI argument resolution and called the wrong constructor.

• Constructor metadata flow

  • Carry concrete managed constructor parameter types from scanner results into the typemap model.
  • Preserve the declaring type/assembly for constructor calls emitted into the typemap assembly.

• UCO IL generation

  • Emit direct calls to the matching managed constructor when available.
  • Convert JNI object parameters with JavaConvert.FromJniHandle<T>().
  • Set the peer reference before invoking the managed constructor.
  • Keep activation-only fallback behavior for inherited seed constructors with no concrete managed constructor.

• Regression coverage

  • Add generator tests that inspect emitted IL for:
    • nctor_*_uco calling the matching managed constructor.
    • JNI object handle conversion before constructor invocation.

Example generated behavior now follows the Java constructor signature:

// Java invokes: nctor_1(self, contextHandle)
// Generated UCO now resolves contextHandle and calls:
obj.SetPeerReference(new JniObjectReference(self));
obj.CustomView(JavaConvert.FromJniHandle<Context>(
    contextHandle,
    JniHandleOwnership.DoNotTransfer));

[Copilot]

Pull request overview

This PR fixes trimmable typemap-generated UCO constructor wrappers so they invoke the correct managed constructor when Java calls a constructor with parameters (instead of always activating via the (IntPtr, JniHandleOwnership) activation constructor). This aligns constructor behavior with the Java signature and ensures JNI arguments are properly resolved (including object-handle conversion).

Changes:

• Extend scanner/model to carry concrete managed constructor parameter types (and declaring type/assembly) into the typemap model.
• Update typemap IL emission to support direct managed constructor invocation, converting JNI object handles via JavaConvert.FromJniHandle<T>() and setting peer references before the call.
• Add generator tests that inspect emitted IL to verify direct constructor calls and JNI handle conversion.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/Microsoft.Android.Sdk.TrimmableTypeMap.Tests/Generator/TypeMapAssemblyGeneratorTests.cs	Adds IL-inspection regression tests for UCO constructor direct-call behavior and handle conversion.
src/Microsoft.Android.Sdk.TrimmableTypeMap/Scanner/JavaPeerScanner.cs	Captures managed constructor parameter type info (and resolves parameter type assemblies) for constructors during scanning.
src/Microsoft.Android.Sdk.TrimmableTypeMap/Scanner/JavaPeerInfo.cs	Extends scanner data model with managed constructor parameter metadata and introduces ManagedParameterInfo.
src/Microsoft.Android.Sdk.TrimmableTypeMap/Generator/TypeMapAssemblyEmitter.cs	Emits direct managed-constructor activation IL path and supports encoding managed parameter types + JavaConvert.FromJniHandle<T>() calls.
src/Microsoft.Android.Sdk.TrimmableTypeMap/Generator/ModelBuilder.cs	Plumbs constructor parameter metadata into UcoConstructorData for emitter consumption.
src/Microsoft.Android.Sdk.TrimmableTypeMap/Generator/Model/TypeMapAssemblyData.cs	Extends UcoConstructorData with managed constructor parameter metadata and declaring type info.
src/Microsoft.Android.Sdk.TrimmableTypeMap/Generator/MetadataHelper.cs	Updates typemap content fingerprint to include UCO constructor managed-parameter metadata (but needs a null vs empty fix).

[simonrozsival]

@copilot address review comments

[Copilot]

@copilot address review comments

Addressed the review comments in 279baeb: the fingerprint now distinguishes null vs empty constructor parameter metadata, and non-constructor marshal methods no longer decode managed signatures. I also pushed a small test-name cleanup in 56db38f.