Run SurfaceFlinger_test as part of Skia presubmit

Bug: 186543004
Test: this

Now that Skia is used as part of SurfaceFlinger, run its tests before
submitting Skia code.

Relevant to b/186543004, since a Skia change recently broke
SurfaceFlinger_test.

Change-Id: Ic2d43345fda60a9a406c54c4f9f42ae6fb81f092
1 file changed