Telephony data refactoring API changes

DataProfile is the parameters used for setup data, but DataProfile
is almost identical as ApnSetting. So move ApnSetting into
DataProfile, also add TrafficDescriptor, which is specific to
5G SA network.

Also added a new state for data handover between IWLAN and cellular.

Bug: 196597630
Test: CTS && atest FrameworksTelephonyTests
Change-Id: I0bd1445a1aacec7ac22fcabe04a2110a32ddf2a2