am c24b1448: Merge "Don\'t mark recycled bitmaps as immutable"

        return nullObjectReturn("Got null SkPixelRef");

    }

    if (!isMutable) {

    if (!isMutable && !useExistingBitmap) {

        // promise we will never change our pixels (great for sharing and pictures)

        pr->setImmutable();

    }

         * If set, decode methods that take the Options object will attempt to

         * reuse this bitmap when loading content. If the decode operation cannot

         * use this bitmap, the decode method will return <code>null</code> and

         * will throw an IllegalArgumentException. The

         * current implementation necessitates that the reused bitmap be of the

         * same size as the source content and in jpeg or png format (whether as a

         * resource or as a stream). The {@link android.graphics.Bitmap.Config

         * will throw an IllegalArgumentException. The current implementation

         * necessitates that the reused bitmap be mutable and of the same size as the

         * source content. The source content must be in jpeg or png format (whether as

         * a resource or as a stream). The {@link android.graphics.Bitmap.Config

         * configuration} of the reused bitmap will override the setting of

         * {@link #inPreferredConfig}, if set.

         * {@link #inPreferredConfig}, if set. The reused bitmap will continue to

         * remain mutable even when decoding a resource which would normally result

         * in an immutable bitmap.

         *

         * <p>You should still always use the returned Bitmap of the decode

         * method and not assume that reusing the bitmap worked, due to the