Allow negative value for CorrelationVector#samplingStartM

Bug: 195934893
Test: on cuttlefish
Change-Id: Ief1514c8d8e48c9c3f13b93c3d2c355a508a84a7
diff --git a/gnss/common/utils/default/Utils.cpp b/gnss/common/utils/default/Utils.cpp
index d136448..23e39b2 100644
--- a/gnss/common/utils/default/Utils.cpp
+++ b/gnss/common/utils/default/Utils.cpp
@@ -221,7 +221,7 @@
         aidl::android::hardware::gnss::CorrelationVector correlationVector2 = {
                 .frequencyOffsetMps = 20,
                 .samplingWidthM = 30,
-                .samplingStartM = 0,
+                .samplingStartM = -10,
                 .magnitude = {0, 3000, 5000, 3000, 0, 0, 1000, 0}};
         measurement.correlationVectors = {correlationVector1, correlationVector2};
         measurement.flags |= GnssMeasurement::HAS_CORRELATION_VECTOR;