Expose lazyViewManagers option on ReactNativeHost

Summary: Changelog: [Android][Added] Option to enable lazyViewManager support with `ViewManagerOnDemandReactPackage`

Reviewed By: RSNara

Differential Revision: D36130066

fbshipit-source-id: b8b04b46f59248baacdf1717f7e32b45e56dd2b8

ReactAndroid/src/main/java/com/facebook/react/LazyReactPackage.java

@@ -143,9 +143,7 @@ public abstract class LazyReactPackage implements ReactPackage {
     List<NativeModule> modules = new ArrayList<>();
     for (ModuleSpec holder : getNativeModules(reactContext)) {
       NativeModule nativeModule;
-      SystraceMessage.beginSection(TRACE_TAG_REACT_JAVA_BRIDGE, "createNativeModule")
-          .arg("module", holder.getType())
-          .flush();
+      SystraceMessage.beginSection(TRACE_TAG_REACT_JAVA_BRIDGE, "createNativeModule").flush();
       ReactMarker.logMarker(ReactMarkerConstants.CREATE_MODULE_START, holder.getName());
       try {
         nativeModule = holder.getProvider().get();

ReactAndroid/src/main/java/com/facebook/react/ReactNativeHost.java

@@ -74,6 +74,7 @@ public abstract class ReactNativeHost {
             .setDevSupportManagerFactory(getDevSupportManagerFactory())
             .setRequireActivity(getShouldRequireActivity())
             .setSurfaceDelegateFactory(getSurfaceDelegateFactory())
+            .setLazyViewManagersEnabled(getLazyViewManagersEnabled())
             .setRedBoxHandler(getRedBoxHandler())
             .setJavaScriptExecutorFactory(getJavaScriptExecutorFactory())
             .setUIImplementationProvider(getUIImplementationProvider())
@@ -135,6 +136,16 @@ public abstract class ReactNativeHost {
     return true;
   }
 
+  /**
+   * Returns whether view managers should be created lazily. See {@link
+   * ViewManagerOnDemandReactPackage} for details.
+   *
+   * @experimental
+   */
+  public boolean getLazyViewManagersEnabled() {
+    return false;
+  }
+
   /**
    * Return the {@link SurfaceDelegateFactory} used by NativeModules to get access to a {@link
    * SurfaceDelegate} to interact with a surface. By default in the mobile platform the {@link

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

@@ -19,9 +19,8 @@ import javax.inject.Provider;
 public class ModuleSpec {
 
   private static final String TAG = "ModuleSpec";
-  private final @Nullable Class<? extends NativeModule> mType;
   private final Provider<? extends NativeModule> mProvider;
-  private final String mName;
+  private final @Nullable String mName;
 
   public static ModuleSpec viewManagerSpec(Provider<? extends NativeModule> provider) {
     return new ModuleSpec(provider);
@@ -54,22 +53,16 @@ public class ModuleSpec {
    * @param provider
    */
   private ModuleSpec(Provider<? extends NativeModule> provider) {
-    mType = null;
     mProvider = provider;
     mName = null;
   }
 
   private ModuleSpec(Provider<? extends NativeModule> provider, String name) {
-    mType = null;
     mProvider = provider;
     mName = name;
   }
 
-  public @Nullable Class<? extends NativeModule> getType() {
-    return mType;
-  }
-
-  public String getName() {
+  public @Nullable String getName() {
     return mName;
   }