Camera: fix wrong assertion logic

Bug: 24747508
diff --git a/tests/tests/hardware/src/android/hardware/camera2/cts/ImageReaderTest.java b/tests/tests/hardware/src/android/hardware/camera2/cts/ImageReaderTest.java
index 7c80c7d..89b038a 100644
--- a/tests/tests/hardware/src/android/hardware/camera2/cts/ImageReaderTest.java
+++ b/tests/tests/hardware/src/android/hardware/camera2/cts/ImageReaderTest.java
@@ -788,7 +788,7 @@
                                     getValueNotNull(result, CaptureResult.SENSOR_EXPOSURE_TIME),
                                     TEST_EXPOSURE_TIME_NS),
                             exposureTimeDiff < EXPOSURE_TIME_ERROR_MARGIN_NS &&
-                            exposureTimeDiff > 0);
+                            exposureTimeDiff >= 0);
 
                     mCollector.expectTrue(
                             String.format("Long processing frame %d format %d size %s " +