Report default location when location is not available in /dev/gnss0 am: c9160995 am: 6ad408d9 am: 1a746bcd

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15684790

Change-Id: Ieb90597baec2d0f7900634748ae5083412845102