getMslAltitudeAccuracyMeters
Returns the estimated Mean Sea Level altitude accuracy in meters of the location at the 68th percentile confidence level. This means that there is 68% chance that the true Mean Sea Level altitude of the location falls within getMslAltitudeMeters +/- this uncertainty.
This is only valid if hasMslAltitudeAccuracy is true.
NOTE: On API levels below 34, the concept of Mean Sea Level altitude accuracy does not exist. In order to allow for backwards compatibility and testing however, this method will attempt to read a float extra with the key EXTRA_MSL_ALTITUDE_ACCURACY and return the result.