Fix bug in Blend that did not use options.

For one of the many variants of Blend, a cut&paste error made
that the options were not passed.

This was not caught because no test exercised this.

I've added the test (in a related CL) and fixed the bug.

Bug: 178718752
Test: Ran the RS Java tests
Change-Id: Ide2fef96137ffd89e4431cf15be5df398036d909