Cherrypick 5b61ea6b from hc-mr1

Fix drawCircle in layoutlib.

Change-Id: I035c48b925cad246ed821e9e59a93d37174982ef
diff --git a/tools/layoutlib/bridge/src/android/graphics/Canvas_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/Canvas_Delegate.java
index e7ae185..5623526 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Canvas_Delegate.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Canvas_Delegate.java
@@ -735,7 +735,7 @@
     /*package*/ static void native_drawCircle(int nativeCanvas,
             float cx, float cy, float radius, int paint) {
         native_drawOval(nativeCanvas,
-                new RectF(cx - radius, cy - radius, radius*2, radius*2),
+                new RectF(cx - radius, cy - radius, radius, radius),
                 paint);
     }