api-impl: add stubs for WhatsApp forwarding Activity

src/api-impl/android/animation/LayoutTransition.java

@@ -9,4 +9,10 @@ public class LayoutTransition {
 	public void setAnimator(int transitionType, Animator animator) {}
 
 	public void setDuration(long duration) {}
+
+	public Animator getAnimator(int transitionType) { return null; }
+
+	public void setDuration(int transitionType, long duration) {}
+
+	public void setInterpolator(int transitionType, TimeInterpolator interpolator) {}
 }

src/api-impl/android/view/View.java

@@ -2231,4 +2231,6 @@ public class View implements Drawable.Callback {
 	public void buildDrawingCache(boolean autoScale) {}
 
 	public Bitmap getDrawingCache() { return null; }
+
+	public void announceForAccessibility(CharSequence text) {}
 }

src/api-impl/android/view/ViewGroup.java

@@ -240,6 +240,8 @@ public class ViewGroup extends View implements ViewParent, ViewManager {
 	}
 
 	public LayoutTransition getLayoutTransition() {
+		if (transition == null)
+			transition = new LayoutTransition();
 		return transition;
 	}