tests: autofocus_test: Fix intermittent failure due to short timeout

Fix an intermittent failure in the focus pause test where the sleep
time may not be long enough to account for the pause control to be
consumed by the ISP and status returned. Also fix the framerate to 30
for more deterministic results.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>

tests/autofocus_test.py

@@ -18,7 +18,7 @@
 print("AF idle")
 
 # We should be able to set the lens position and see it reported back.
-picam2.set_controls({'LensPosition': 1.5})
+picam2.set_controls({'LensPosition': 1.5, 'FrameRate': 30})
 time.sleep(0.5)
 lp = picam2.capture_metadata()['LensPosition']
 if lp < 1.45 or lp > 1.55:
@@ -44,7 +44,7 @@
         print("Continuous AF state is", state)
     # Try "pausing" it.
     picam2.set_controls({'AfPause': controls.AfPauseEnum.Deferred})
-    time.sleep(0.2)
+    time.sleep(0.3)
     state = picam2.capture_metadata()['AfPauseState']
     if state not in (controls.AfPauseStateEnum.Paused, controls.AfPauseStateEnum.Pausing):
         print("ERROR: continuous AF pause failure, got", state)