Add a method to determine if a reboot is required to alter the modem config

Bug: 123101701
Test: sanity
Change-Id: I841b947efda0016c003f54ecf7853624582abab9
Merged-In: I841b947efda0016c003f54ecf7853624582abab9
(cherry picked from commit 7eca4afab4565ca1bd0f9827e93370885ba5ccea)
3 files changed