DO NOT MERGE Add another MCC/MNC override for Guam to telephonylookup.xml [R].

MCCMNC:310470 was added to Guam mobile network.

Bug: 210384434

Test: presubmit only
Change-Id: I431f96bd60d59364673a0d0848268cb8e18a55cf
Merged-In: I431f96bd60d59364673a0d0848268cb8e18a55cf
(cherry picked from commit 9c07132ed6193447f8bd8d1be91404019fc1b565)
9 files changed