Update TestGnssMeasurementIsFullTracking

Bug: 257549183
Test: atest VtsHalGnssTargetTest
Change-Id: I49d91e40515384480508ba88bcb052bd4ee81ccd
diff --git a/gnss/aidl/vts/gnss_hal_test.cpp b/gnss/aidl/vts/gnss_hal_test.cpp
index b4f2b77..7578585 100644
--- a/gnss/aidl/vts/gnss_hal_test.cpp
+++ b/gnss/aidl/vts/gnss_hal_test.cpp
@@ -489,7 +489,9 @@
         // Validity check GnssData fields
         checkGnssMeasurementClockFields(lastGnssData);
         if (aidl_gnss_hal_->getInterfaceVersion() >= 3) {
-            EXPECT_EQ(lastGnssData.isFullTracking, isFullTracking);
+            if (isFullTracking) {
+                EXPECT_EQ(lastGnssData.isFullTracking, isFullTracking);
+            }
         }
         for (const auto& measurement : lastGnssData.measurements) {
             checkGnssMeasurementFields(measurement, lastGnssData);