Remove sensitive info from SUPL requests

Except in case of emergency, do not include sensitive subscriber
information in SUPL requests (A-GPS).

Issue: calyxos#618
Co-Authored-By: MSe1969 <mse1969@posteo.de>
Co-Authored-By: Michael Bestas <mkbestas@gmail.com>
Change-Id: I9f372cfcf02d3b768bd5cf1de220eea1fe8c1dbb