Add missing usage to buffer

The test's buffer is read by the GPU and therefore needs to be allocated with
AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE

Bug: 234143058
Bug: 158790260
Test: atest ASurfaceControlTest
Change-Id: I918a1875d66de9c70a3bae2ec9666adaf992a12b
1 file changed