Expose getJSIModule as part of the ReactContext class

Summary:
This diff exposes the getJSIModule on the ReactContext class.
This class already has methods to obtain NativeModules and JSModules, it make sense to expose the getJSIModule method too.

Changelog: [internal]

Reviewed By: JoshuaGross

Differential Revision: D18862858

fbshipit-source-id: 95fe48c065266060c96fc40a002041ba398b3134

ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java

@@ -427,4 +427,12 @@ public class ReactContext extends ContextWrapper {
   public JavaScriptContextHolder getJavaScriptContextHolder() {
     return mCatalystInstance.getJavaScriptContextHolder();
   }
+
+  public JSIModule getJSIModule(JSIModuleType moduleType) {
+    if (!hasActiveCatalystInstance()) {
+      throw new IllegalStateException(
+          "Unable to retrieve a JSIModule if CatalystInstance is not active.");
+    }
+    return mCatalystInstance.getJSIModule(moduleType);
+  }
 }