[ITS][Scene1] Disable AF in Test DNG Noise

bug: 159578452
Merged-In: I6bbad81bff7704ece6aeaca26d3187d387810357
Change-Id: I79113d6db5e26823a0172a7c1f15952df597a8eb
diff --git a/apps/CameraITS/tests/scene1_1/test_dng_noise_model.py b/apps/CameraITS/tests/scene1_1/test_dng_noise_model.py
index 98efd4e..e257937 100644
--- a/apps/CameraITS/tests/scene1_1/test_dng_noise_model.py
+++ b/apps/CameraITS/tests/scene1_1/test_dng_noise_model.py
@@ -57,8 +57,10 @@
         sens_min, _ = props['android.sensor.info.sensitivityRange']
         sens_max_ana = props['android.sensor.maxAnalogSensitivity']
         sens_step = (sens_max_ana - sens_min) / NUM_STEPS
-        s_ae, e_ae, _, _, f_dist = cam.do_3a(get_results=True)
+        s_ae, e_ae, _, _, _ = cam.do_3a(get_results=True)
         s_e_prod = s_ae * e_ae
+        # Focus at zero to intentionally blur the scene as much as possible.
+        f_dist = 0.0
         sensitivities = range(sens_min, sens_max_ana+1, sens_step)
 
         var_expected = [[], [], [], []]