Add support for GradientColor in layoutlib

Change-Id: Ia9a55a9e00d7ddb5263f3dbe46b5da8dde457526
diff --git a/bridge/src/android/graphics/Paint_Delegate.java b/bridge/src/android/graphics/Paint_Delegate.java
index 839c182..33296e1 100644
--- a/bridge/src/android/graphics/Paint_Delegate.java
+++ b/bridge/src/android/graphics/Paint_Delegate.java
@@ -227,6 +227,10 @@
         mColorFilter = ColorFilter_Delegate.getDelegate(colorFilterPtr);
     }
 
+    public void setShader(long shaderPtr) {
+        mShader = Shader_Delegate.getDelegate(shaderPtr);
+    }
+
     /**
      * Returns the {@link Shader} delegate or null if none have been set
      *