Camera: set fixed FPS range for test_jitter

Test: test pass on existing devices
Bug: 137343451
Change-Id: I1ea06e3d780a32462d96684b4c717c31bb91fdf6
diff --git a/apps/CameraITS/tests/scene0/test_jitter.py b/apps/CameraITS/tests/scene0/test_jitter.py
index c75ee60..1bc0855 100644
--- a/apps/CameraITS/tests/scene0/test_jitter.py
+++ b/apps/CameraITS/tests/scene0/test_jitter.py
@@ -23,6 +23,7 @@
 from matplotlib import pylab
 
 # PASS/FAIL thresholds
+TEST_FPS = 30
 MIN_AVG_FRAME_DELTA = 30  # at least 30ms delta between frames
 MAX_VAR_FRAME_DELTA = 0.01  # variance of frame deltas
 MAX_FRAME_DELTA_JITTER = 0.3  # max ms gap from the average frame delta
@@ -39,6 +40,7 @@
                              its.caps.sensor_fusion(props))
 
         req, fmt = its.objects.get_fastest_manual_capture_settings(props)
+        req["android.control.aeTargetFpsRange"] = [TEST_FPS, TEST_FPS]
         caps = cam.do_capture([req]*50, [fmt])
 
         # Print out the millisecond delta between the start of each exposure