Don't adjust animation play time if not necessary

Potential fix for Bug: 11080792

src/com/android/photos/BitmapRegionTileSource.java

@@ -94,7 +94,6 @@ class SimpleBitmapRegionDecoderWrapper implements SimpleBitmapRegionDecoder {
 }
 
 class DumbBitmapRegionDecoder implements SimpleBitmapRegionDecoder {
-    //byte[] mStreamCopy;
     Bitmap mBuffer;
     Canvas mTempCanvas;
     Paint mTempPaint;