InCallUI: Add international prefix support

When international prefix is enabled in CDMA mode, check and
convert international prefix.

When MO/MT call, check phone number with international prefix.
add flag of whether with international prefix,if has prefix,
will add the prefix before the number,eg:+33.
API name change:
in M Android:SubscriptionManager.getDefaultVoiceSubId();
in N :SubscriptionManager.getDefaultVoiceSubscriptionId().

Change-Id: I62071721b4e5217063872f604fa5cc3f0a2676dd
CRs-fixed: 1037633