Hide mouse pointer during SurfaceViewSyncTests.

This CL changes the pointer icon for the test activity to an empty image.
It makes sure that the pointer drawn over the tested rendering result won't
interfere the test result.

Bug: 62044128
Test: Connect and move mouse, and run android.view.cts.SurfaceViewSyncTests CTS
Change-Id: Ic83a231b5cadd0734dfbfbf7d031618d11461c13
1 file changed