Fix serialization bug in GpsNavigationMessage am: a1b4297002 am: fb37bba744 am: 720c338bcb am: 6a9fff7078

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15878935

Change-Id: I412ff3619c82e6b32e3ddf15c28c4cd13368dab4