Move utcTime in default implementation forward

Bug: 175890761
Test: atest GnssLocationUpdateIntervalTest#testLocationUpdatesAtVariousIntervals
Change-Id: Iab572243fc8cbf2f34df0b45614050ad794af384
diff --git a/gnss/common/utils/default/Utils.cpp b/gnss/common/utils/default/Utils.cpp
index e383d51..21282f4 100644
--- a/gnss/common/utils/default/Utils.cpp
+++ b/gnss/common/utils/default/Utils.cpp
@@ -228,7 +228,8 @@
             .verticalAccuracyMeters = kMockVerticalAccuracyMeters,
             .speedAccuracyMetersPerSecond = kMockSpeedAccuracyMetersPerSecond,
             .bearingAccuracyDegrees = kMockBearingAccuracyDegrees,
-            .timestamp = kMockTimestamp};
+            .timestamp =
+                    static_cast<int64_t>(kMockTimestamp + ::android::elapsedRealtimeNano() / 1e6)};
     return location;
 }