Setup experiment for split packages

Reviewed By: javache

Differential Revision: D5314224

fbshipit-source-id: b9bc28b8f4e058db1dcc0c17f7dc84bf15eb33f9

Author: Kathy Gray

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

@@ -223,7 +223,8 @@ public static ReactInstanceManagerBuilder builder() {
     @Nullable DevBundleDownloadListener devBundleDownloadListener,
     boolean setupReactContextInBackgroundEnabled,
     boolean useSeparateUIBackgroundThread,
-    int minNumShakes) {
+    int minNumShakes,
+    boolean splitPackagesEnabled) {
     Log.d(ReactConstants.TAG, "ReactInstanceManager.ctor()");
     initializeSoLoaderIfNecessary(applicationContext);
 
@@ -256,7 +257,7 @@ public static ReactInstanceManagerBuilder builder() {
     mUseSeparateUIBackgroundThread = useSeparateUIBackgroundThread;
     mMinNumShakes = minNumShakes;
 
-    if (true) { // TODO Change to a QE-determined experiment variable in separate commit
+    if (!splitPackagesEnabled) {
       CoreModulesPackage coreModulesPackage =
         new CoreModulesPackage(
           this,

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

@@ -47,6 +47,7 @@ public class ReactInstanceManagerBuilder {
   protected boolean mSetupReactContextInBackground;
   protected boolean mUseSeparateUIBackgroundThread;
   protected int mMinNumShakes = 1;
+  protected boolean mEnableSplitPackage;
 
   /* package protected */ ReactInstanceManagerBuilder() {
   }
@@ -213,6 +214,11 @@ public ReactInstanceManagerBuilder setMinNumShakes(int minNumShakes) {
     return this;
   }
 
+  public ReactInstanceManagerBuilder setEnableSplitPackage(boolean enableSplitPackage) {
+    mEnableSplitPackage = enableSplitPackage;
+    return this;
+  }
+
   /**
    * Instantiates a new {@link ReactInstanceManager}.
    * Before calling {@code build}, the following must be called:
@@ -262,6 +268,7 @@ public ReactInstanceManager build() {
       mDevBundleDownloadListener,
       mSetupReactContextInBackground,
       mUseSeparateUIBackgroundThread,
-      mMinNumShakes);
+      mMinNumShakes,
+      mEnableSplitPackage);
   }
 }