Kotlinfy ReactNativeConfig (#39142)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/39142

X-link: https://github.com/facebookresearch/playtorch/pull/227

`ReactNativeConfig.java` -> `ReactNativeConfig.kt`

changelog: [internal] internal

Reviewed By: rshest

Differential Revision: D48585508

fbshipit-source-id: 46035062662eeebddf546814dbcef239e769e17f

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/ReactNativeConfig.kt

@@ -5,55 +5,50 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-package com.facebook.react.fabric;
+package com.facebook.react.fabric
 
-import androidx.annotation.NonNull;
-import com.facebook.proguard.annotations.DoNotStrip;
+import com.facebook.proguard.annotations.DoNotStrip
 
 /**
  * ReactNative Configuration that allows to customize the behavior of key/value pairs used by the
  * framework to enable/disable capabilities.
  *
- * <p>The hosting app should provide an implementation of this interface to allow specific
- * customization of single keys. An empty implementation is available as {@link
- * EmptyReactNativeConfig}.
+ * The hosting app should provide an implementation of this interface to allow specific
+ * customization of single keys. An empty implementation is available as [EmptyReactNativeConfig].
  *
- * <p>This is a wrapper for the ReactNativeConfig object in C++
+ * This is a wrapper for the ReactNativeConfig object in C++
  */
 @DoNotStrip
-public interface ReactNativeConfig {
-
-  ReactNativeConfig DEFAULT_CONFIG = new EmptyReactNativeConfig();
-
+interface ReactNativeConfig {
   /**
    * Get a boolean param by string name. Default should be false.
    *
    * @param param The string name of the parameter being requested.
    */
-  @DoNotStrip
-  boolean getBool(@NonNull String param);
+  @DoNotStrip fun getBool(param: String): Boolean
 
   /**
    * Get a Long param by string name. Default should be 0.
    *
    * @param param The string name of the parameter being requested.
    */
-  @DoNotStrip
-  long getInt64(@NonNull String param);
+  @DoNotStrip fun getInt64(param: String): Long
 
   /**
    * Get a string param by string name. Default should be "", empty string.
    *
    * @param param The string name of the parameter being requested.
    */
-  @DoNotStrip
-  String getString(@NonNull String param);
+  @DoNotStrip fun getString(param: String): String
 
   /**
    * Get a double param by string name. Default should be 0.
    *
    * @param param The string name of the parameter being requested.
    */
-  @DoNotStrip
-  double getDouble(@NonNull String param);
+  @DoNotStrip fun getDouble(param: String): Double
+
+  companion object {
+    @JvmField val DEFAULT_CONFIG: ReactNativeConfig = EmptyReactNativeConfig()
+  }
 }