Camera: Put CameraTest#testPreviewFpsRange into known failures

The test is flaky on nearly all devices, even after the timing
requirements have been repeteadly loosened. Mark as a bad test
until it can be refurbished so that failures can be better
pointed at devices and not the test

Bug: 23008511
Change-Id: I35c378ac1ab8108b6317dd80e46f3ad3b84ec9f2
diff --git a/tests/expectations/knownfailures.txt b/tests/expectations/knownfailures.txt
index 66528b9..754e38a 100644
--- a/tests/expectations/knownfailures.txt
+++ b/tests/expectations/knownfailures.txt
@@ -201,6 +201,13 @@
   bug: 22861512
 },
 {
+  description: "The timing measurements for preview callbacks are not reliable",
+  names: [
+    "android.hardware.cts.CameraTest#testPreviewFpsRange"
+  ],
+  bug: 23008511
+},
+{
   description: "known failures",
   names: [
     "android.hardware.cts.SensorBatchingTests#testAccelerometer_50hz_batching",