Fixed the incorrect carrier config for 5G icon timer

The default value of 5G icon timer reset during voice call
was incorrectly enabled. It should be disabled by default
and only enabled for Verizon.

Fix: 345668599
Fix: 370840390
Test: Basic telephony functionality tests
Flag: EXEMPT bug fix
Change-Id: I11c6b9d68f3419886f2dbd9f42d8f39f60e73e70