1. refine the naming in DnsPacket and add more comment
2. add comment in DnsResolver
Test: built, flashed, booted
atest DnsResolverTest DnsPacketTest
Change-Id: Ib482d079d6823fd1d9bff163427b7aad38374199
1. refine the naming in DnsPacket and add more comment
2. add comment in DnsResolver
Test: built, flashed, booted
atest DnsResolverTest DnsPacketTest
Change-Id: Ib482d079d6823fd1d9bff163427b7aad38374199