Updating pre/post submit tests

Adding SurfaceFlinger_test to presubmit, and sffakehwc_test
to postsubmit.

Bug: 160796914
Test: atest -s 127.0.0.1:37975 --test-mapping TEST_MAPPING:presubmit
Test: atest -s 127.0.0.1:38029 --test-mapping TEST_MAPPING:postsubmit
Change-Id: I0c36ec37f7876e8714a7efe2cf8787a36543562b
1 file changed