Adapt ReadableMapBuffer to MapBuffer interface

Summary:
Updates `ReadableMapBuffer` to conform to `MapBuffer` interface, to allow interchangeable use of `Readable/WritableMapBuffer` in the code.

Notable changes:
- MapBuffer.Entry getters are now represented as Kotlin properties and appended `Value` suffix (e.g. `entry.getInt()` becomes `entry.getIntValue()` in Java, or `entry.intValue` in Kotlin)
- `ByteBuffer` is imported in constructor instead of on demand. This method doesn't copy the data as the bytes are read directly from native heap, and benchmarking a 500-byte `MapBuffer` shows no difference in import speed.
- Internal logic of `ReadableMapBuffer` uses `UShort` kotlin type for key retrieval, for more correct representation of values.
- Explicit exception throws are replaced with `require` and `check` methods for `IllegalArgumentException` and `IllegalStateException` (default FB conversion).

The change also updates `ReadableMapBuffer` usages to `MapBuffer` interface where possible (virtually everywhere except JNI methods).

Changelog: [Android][Changed] - Adopt `MapBuffer` interface for `ReadableMapBuffer`

Reviewed By: mdvacca

Differential Revision: D35218633

fbshipit-source-id: 515dd974c27b2978ade325b2e1750ab8f068a20a

ReactAndroid/src/main/java/com/facebook/react/fabric/BUCK

@@ -14,6 +14,7 @@ rn_android_library(
         "pfh:ReactNative_CommonInfrastructurePlaceholde",
         "supermodule:xplat/default/public.react_native.infra",
     ],
+    language = "KOTLIN",
     provided_deps = [
         react_native_dep("third-party/android/androidx:annotation"),
         react_native_dep("third-party/android/androidx:core"),
@@ -21,6 +22,7 @@ rn_android_library(
         react_native_dep("third-party/android/androidx:legacy-support-core-ui"),
         react_native_dep("third-party/android/androidx:legacy-support-core-utils"),
     ],
+    pure_kotlin = False,
     required_for_source_only_abi = True,
     visibility = [
         "PUBLIC",

ReactAndroid/src/main/java/com/facebook/react/fabric/FabricJSIModuleProvider.java

@@ -11,7 +11,7 @@ import androidx.annotation.NonNull;
 import com.facebook.react.bridge.JSIModuleProvider;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.UIManager;
-import com.facebook.react.common.mapbuffer.ReadableMapBufferSoLoader;
+import com.facebook.react.common.mapbuffer.MapBufferSoLoader;
 import com.facebook.react.config.ReactFeatureFlags;
 import com.facebook.react.fabric.events.EventBeatManager;
 import com.facebook.react.uimanager.ViewManagerRegistry;
@@ -46,7 +46,7 @@ public class FabricJSIModuleProvider implements JSIModuleProvider<UIManager> {
     final Binding binding = new Binding();
 
     if (ReactFeatureFlags.isMapBufferSerializationEnabled()) {
-      ReadableMapBufferSoLoader.staticInit();
+      MapBufferSoLoader.staticInit();
     }
 
     binding.register(

ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/MountingManager.java

@@ -23,7 +23,7 @@ import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.RetryableMountingLayerException;
 import com.facebook.react.bridge.UiThreadUtil;
-import com.facebook.react.common.mapbuffer.ReadableMapBuffer;
+import com.facebook.react.common.mapbuffer.MapBuffer;
 import com.facebook.react.fabric.FabricUIManager;
 import com.facebook.react.fabric.events.EventEmitterWrapper;
 import com.facebook.react.fabric.mounting.mountitems.MountItem;
@@ -396,9 +396,9 @@ public class MountingManager {
   public long measureMapBuffer(
       @NonNull ReactContext context,
       @NonNull String componentName,
-      @NonNull ReadableMapBuffer localData,
-      @NonNull ReadableMapBuffer props,
-      @Nullable ReadableMapBuffer state,
+      @NonNull MapBuffer localData,
+      @NonNull MapBuffer props,
+      @Nullable MapBuffer state,
       float width,
       @NonNull YogaMeasureMode widthMode,
       float height,