support carrier specific initial value of data_roaming

1. new carrier config for default data roaming value
to support carrier specific feature: turn on data_roaming by default.
2. use a sharedpref to record if user has ever touch the setting
before.
3. on sim loaded, update data roaming setting: In the absence of
user-pref, override with the carrier default value. otherwise migrate
user-pref when swap to new SIM.

Bug: 63532986
Test: manual tests includes factory reset, hot sim swap and build
updates without factory reset.
Change-Id: I64619a0df27ad36595f4d063cd66f73595ad24f3