create getModemEnabled function in PhoneConfigurationManager

Bug: 124402911
Test: build
Change-Id: Ib8ef7887c84c5ec5e67478bb766dbeff7edb8594
Merged-In: Ib8ef7887c84c5ec5e67478bb766dbeff7edb8594
(cherry picked from commit 6149100e5ced9da1816c72b60299803ac95cfedd)
1 file changed