Do not get CM instance in getActiveModemCount unless needed.

TM#getActiveModemCount might be called before ConnectivityService is
initialized. So do not try to get ConnectivityService instance unless
it's needed (very rarely). Otherwise it will throw WTF exception.

Bug: 144373595
Test: sanity
Change-Id: I7a90ec45a0a3700a0c6852c505d68f438f26768c
Merged-In: I7a90ec45a0a3700a0c6852c505d68f438f26768c
1 file changed