Report GnssStatusValue when GNSS start/stop

Also add carrier frequencies to the mock GnssStatus and GnssAntennaInfo

Bug: 194117673
Test: atest GnssStatusTest
Change-Id: Ib22aefe8e4dc8389a933e9009e36872287546c7b
diff --git a/gnss/common/utils/default/include/Constants.h b/gnss/common/utils/default/include/Constants.h
index a290ed2..22afee1 100644
--- a/gnss/common/utils/default/include/Constants.h
+++ b/gnss/common/utils/default/include/Constants.h
@@ -29,6 +29,10 @@
 const float kMockSpeedAccuracyMetersPerSecond = 1;
 const float kMockBearingAccuracyDegrees = 90;
 const int64_t kMockTimestamp = 1519930775453L;
+const float kGpsL1FreqHz = 1575.42 * 1e6;
+const float kGpsL5FreqHz = 1176.45 * 1e6;
+const float kGloG1FreqHz = 1602.0 * 1e6;
+const float kIrnssL5FreqHz = 1176.45 * 1e6;
 
 }  // namespace common
 }  // namespace gnss