Bluesky add position uncertainty field

Add the horizontal position uncertainty for the provided location
by Bluesky at which the corrections are computed.
This is a bug fix as these fields were missing in the original submit.

Bug: 111441283
Test: Existing tests pass.
Change-Id: I3c6df7bcd72d6bab11c4e1cc4908e24034958ad7
1 file changed