Clear ThreadLocal storage from Choreographer

Change-Id: I5abb5c68a635e7808b0a036ba4d9971cd0139aa3

tools/layoutlib/bridge/src/android/view/Choreographer_Delegate.java

@@ -15,8 +15,11 @@
  */
 package android.view;
 
+import com.android.ide.common.rendering.api.LayoutLog;
+import com.android.layoutlib.bridge.Bridge;
 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
 
+import java.lang.reflect.Field;
 import java.util.concurrent.atomic.AtomicReference;
 
 /**
@@ -64,4 +67,17 @@ public class Choreographer_Delegate {
 
         thisChoreographer.doCallbacks(Choreographer.CALLBACK_COMMIT, frameTimeNanos);
     }
+
+    public static void dispose() {
+        try {
+            Field threadInstanceField = Choreographer.class.getDeclaredField("sThreadInstance");
+            @SuppressWarnings("unchecked") ThreadLocal<Choreographer> threadInstance =
+                    (ThreadLocal<Choreographer>) threadInstanceField.get(null);
+            threadInstance.remove();
+        } catch (ReflectiveOperationException e) {
+            assert false;
+            Bridge.getLog().error(LayoutLog.TAG_BROKEN,
+                    "Unable to clear Choreographer memory.", e, null);
+        }
+    }
 }

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java

@@ -1434,6 +1434,7 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
 
         if (createdLooper) {
             Bridge.cleanupThread();
+            Choreographer_Delegate.dispose();
         }
     }
 }