Implement HorizontalScrollView component

Summary: This diff implements the HorizontalScrollView component for Android Fabric C++, as part of this diff I also re-named the components AndroidHorizontalScrollContentView for RCTAndroidHorizontalScrollContentView and AndroidHorizontalScrollView for RCTAndroidHorizontalScrollView. This might sound against our plan of removing the RCT preffix, but it is to make it simpler to map components between current implementation of RN and Fabric (otherwise we don't know when to add the RCT preffix in Android side to find the right View Manager), later we can just remove the preffix from C++, Android, iOS and JS.

Reviewed By: shergin, achen1

Differential Revision: D9122729

fbshipit-source-id: e9299552857c6dd0c18abfa5fa49a3d50e221729

ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollContainerViewManager.java

@@ -14,7 +14,7 @@ import com.facebook.react.uimanager.ViewGroupManager;
 public class ReactHorizontalScrollContainerViewManager
     extends ViewGroupManager<ReactHorizontalScrollContainerView> {
 
-  protected static final String REACT_CLASS = "AndroidHorizontalScrollContentView";
+  protected static final String REACT_CLASS = "RCTAndroidHorizontalScrollContentView";
 
   public ReactHorizontalScrollContainerViewManager() {}
 

ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollViewManager.java

@@ -37,7 +37,7 @@ public class ReactHorizontalScrollViewManager
     extends ViewGroupManager<ReactHorizontalScrollView>
     implements ReactScrollViewCommandHelper.ScrollCommandHandler<ReactHorizontalScrollView> {
 
-  protected static final String REACT_CLASS = "AndroidHorizontalScrollView";
+  protected static final String REACT_CLASS = "RCTAndroidHorizontalScrollView";
 
   private static final int[] SPACING_TYPES = {
       Spacing.ALL, Spacing.LEFT, Spacing.RIGHT, Spacing.TOP, Spacing.BOTTOM,