NetworkSelectionStatusXmlUtil: Add utility

Add a utility for |NetworkSelectionStatus| class serialization/
deserialization.

While there,
Fix the doc strings in the existing utils to add links to the original
object they're trying to serialize deserialize.

PS: Will add a follow up CL to shorten the method names of all these
utils: NetworkSelectionStatusXmlUtil.parseFromXml/writeToXml. The
current names are unnecessarily long.

BUG: 29273147
Change-Id: I59f056a2b99e8583930b716707284d4ccf14392a
TEST: Added Unit tests
3 files changed
tree: 9be7aa075fa52fedab81cabc4930bfa49d9bb311
  1. service/
  2. tests/