Sync RTT config from framework to Modem.

1st. For this update, when updateImsServiceconfig is in process, it add
updateRttConfigValue to sync RTT config. It can solve if RTT config
change before factory reset or flash ROM, RTT config in modem side
would be different from framework side.

2nd. To prevent VoLTE config out of sync with modem from
RTT switch change. When RTT config turn on, it will use
setEnhanced4gLteModeSetting instead of setAdvanced4GMode for VoLTE
config sync. When RTT config turn off, it will depend on user's config
to decide VoLTE on or off.

Bug: b/110891445
Test: 1. Manual flip RTT switch and MobileData switch to obserb
      updateImsServiceConfig for checking RTT sync process.
      2. Do factory reset and check solution in process.
      3. Make a RTT call to check config is synced and RTT is work.

Change-Id: Ie44b783d54cc605ba383a3e402df8dea25131919