Use IPv4v6 as default protocol when APN setting is not available

Use IPv4v6 for default protocol and IPv4 for default roaming protocol
when APN setting is not available.

Fix: 258636082
Test: atest DataProfileTest
Merged-In: Ic61fa42f99750e6e48ea1cd08f058af3fd67c551
Change-Id: Ic61fa42f99750e6e48ea1cd08f058af3fd67c551