Hook up CPP props parsing and Android ViewRecycling feature flags on Android

Summary:
Hook up feature flags.

Changelog: [Internal]

Reviewed By: cortinico, ryancat

Differential Revision: D37166366

fbshipit-source-id: 440acba9ee85a9ced64cd880d915044de7619584

ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -130,4 +130,9 @@ public class ReactFeatureFlags {
    * Feature Flag to enable View Recycling. When enabled, individual ViewManagers must still opt-in.
    */
   public static boolean enableViewRecycling = false;
+
+  /**
+   * Enable prop iterator setter-style construction of Props in C++ (this flag is not used in Java).
+   */
+  public static boolean enableCppPropsIteratorSetter = false;
 }

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/Binding.cpp

@@ -32,6 +32,9 @@
 #include <react/renderer/uimanager/primitives.h>
 #include <react/utils/ContextContainer.h>
 
+// Included to set BaseTextProps config; can be deleted later.
+#include <react/renderer/components/text/BaseTextProps.h>
+
 #include <glog/logging.h>
 
 using namespace facebook::jni;
@@ -441,6 +444,13 @@ void Binding::installFabricUIManager(
       "EnableLargeTextMeasureCache",
       getFeatureFlagValue("enableLargeTextMeasureCache"));
 
+  // Props setter pattern feature
+  Props::enablePropIteratorSetter =
+      getFeatureFlagValue("enableCppPropsIteratorSetter");
+  AccessibilityProps::enablePropIteratorSetter =
+      Props::enablePropIteratorSetter;
+  BaseTextProps::enablePropIteratorSetter = Props::enablePropIteratorSetter;
+
   auto toolbox = SchedulerToolbox{};
   toolbox.contextContainer = contextContainer;
   toolbox.componentRegistryFactory = componentsRegistry->buildRegistryFunction;