Fix nine patch scaling

Fix nine patch scaling for assets that don't match the DPI.
Sometimes nine patches were scaled up with divs bigger than
width/height. This is fixing incorrect SearchView control draw
for 213dpi material theme in ThemeHostTest.

Test: Ran CtsGraphicsTestCases, CtsUiRenderingTestCases tests
Change-Id: Ifb8037e8ece97b802e723f911d9b74ccd8fe5400