Merge change 3410 into donut

* changes:
  Move storeImage to worker thread so we can start preview in parallel.
diff --git a/src/com/android/camera/VideoCamera.java b/src/com/android/camera/VideoCamera.java
index e3143d0..547c4b5 100644
--- a/src/com/android/camera/VideoCamera.java
+++ b/src/com/android/camera/VideoCamera.java
@@ -484,12 +484,7 @@
 
         Log.v(TAG, "startPreview");
         if (mPreviewing) {
-            // We should just return here, but we stop and start again to avoid
-            // the bug in driver.
-            mCameraDevice.lock();
-            mCameraDevice.stopPreview();
-            mCameraDevice.startPreview();
-            mCameraDevice.unlock();
+            // After recording a video, preview is not stopped. So just return.
             return true;
         }