Add new parameter to the render method to allow forcing a measure pass.

Change-Id: I60c09f3375fc85c257a449f4372220741e01db54
(cherry picked from commit c13aa0c035)

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/BridgeRenderSession.java

@@ -86,11 +86,14 @@ public class BridgeRenderSession extends RenderSession {
     }
 
     @Override
-    public Result render(long timeout) {
+    public Result render(long timeout, boolean forceMeasure) {
         try {
             Bridge.prepareThread();
             mLastResult = mSession.acquire(timeout);
             if (mLastResult.isSuccess()) {
+                if (forceMeasure) {
+                    mSession.invalidateRenderingSize();
+                }
                 mLastResult = mSession.render(false /*freshRender*/);
             }
         } finally {

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

@@ -1642,7 +1642,7 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
         return null;
     }
 
-    private void invalidateRenderingSize() {
+    public void invalidateRenderingSize() {
         mMeasuredScreenWidth = mMeasuredScreenHeight = -1;
     }