Split reflection-based JniTypeManager behavior

[simonrozsival]

Draft PR to let CI validate the JniTypeManager split and AOT warning work.

Summary:

• Keep JniTypeManager as the abstract base and move reflection-backed behavior into DynamicJniTypeManager.
• Update JRE/test managers that extend the default behavior to inherit from DynamicJniTypeManager.
• Keep NativeAOT sample managers on the abstract base with explicit mappings instead of reflection-backed base calls.
• Update public API baselines for the split.

Local validation:

• dotnet build src/Java.Interop/Java.Interop.csproj -p:JavaCPath="$JAVA_HOME/bin/javac" -p:JarPath="$JAVA_HOME/bin/jar"
• dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj -p:JavaCPath="$JAVA_HOME/bin/javac" -p:JarPath="$JAVA_HOME/bin/jar" -p:NativeToolchainSupported=false

Notes:

• Full local prepare/build is still blocked in this workspace by local build setup/toolchain issues, so this is intentionally draft for CI coverage.

[simonrozsival]

/azp run

[azure-pipelines]

No pipelines are associated with this pull request.

[Copilot]

Pull request overview

This draft PR refactors JniRuntime.JniTypeManager into an abstract base and moves the default reflection-based behavior into a new JniRuntime.DynamicJniTypeManager, with corresponding updates across tests, JRE runtime helpers, samples, and public API baselines.

Changes:

• Introduces JniRuntime.DynamicJniTypeManager and makes JniRuntime.JniTypeManager abstract, shifting default/reflection-backed logic into the new derived type.
• Updates test and JRE type managers to inherit from DynamicJniTypeManager, and adjusts tests for new behaviors (e.g., generic invoker handling, GetType array behavior).
• Updates trimmer/AOT annotations and PublicAPI baselines to reflect the split and new abstract members.

Show a summary per file

File	Description
tests/Java.Interop-Tests/Java.Interop/JniTypeManagerTests.cs	Updates expectations around GetType behavior (notably array signatures and generic holder mapping).
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.cs	Switches proxy manager to DynamicJniTypeManager and adds trim suppression for test-only reflection use.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.cs	Adds a generic invoker negative test and updates test manager base type.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.cs	Updates fixture type manager to DynamicJniTypeManager and refines type lookup with trimming annotations.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs	Moves to DynamicJniTypeManager and adds a DAM-annotated GetTypeForSimpleReference override.
src/Java.Interop/PublicAPI.Unshipped.txt	Records newly introduced/reshaped APIs (new type, newly-abstract members, overrides).
src/Java.Interop/PublicAPI.Shipped.txt	Updates shipped API surface to reflect newly-abstract members and removed methods from JniTypeManager.
src/Java.Interop/Java.Interop/JniValueMarshaler.cs	Simplifies expression-based marshaler instantiation and adjusts trimming annotations.
src/Java.Interop/Java.Interop/JniRuntime.JniValueManager.cs	Switches peer-type selection to GetReflectionConstructibleTypes() and refactors uninitialized peer creation.
src/Java.Interop/Java.Interop/JniRuntime.JniTypeManager.cs	Makes JniTypeManager abstract and factors previously-inlined logic into abstract core methods.
src/Java.Interop/Java.Interop/JniRuntime.DynamicJniTypeManager.cs	Adds the new reflection-backed type manager implementation and related registration behavior.
src/Java.Interop/Java.Interop/JniRuntime.cs	Removes the default new JniTypeManager() fallback; requires an explicit type manager in creation options.
src/Java.Interop/Java.Interop/JavaPrimitiveArrays.tt	Retargets primitive array helper generation to DynamicJniTypeManager.
src/Java.Interop/Java.Interop/JavaPrimitiveArrays.cs	Updates the generated primitive array helper container type to DynamicJniTypeManager.
src/Java.Interop/GlobalSuppressions.cs	Adds CA1034 suppression for the new nested DynamicJniTypeManager type.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs	Updates sample type manager implementation to new hierarchy and adds explicit native member registration.
samples/Hello-NativeAOTFromJNI/ManagedType.cs	Changes the native registration hook to internal for sample-driven registration.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs	Updates sample type manager implementation to new hierarchy and implements abstract members.

Copilot's findings

• Files reviewed: 18/18 changed files
• Comments generated: 3