Move NetworkUtils used by NetworkStack

Depending on usage move into NetworkStackUtils or shared
Inet4AddressUtils.

Test: atest FrameworksNetTests NetworkStackTests
Bug: 112869080
Merged-In: Ie20dcee375b377236004a7689890729493aca857
Change-Id: Ib8d000529872796022706a35050fdc2c7141f2ab
15 files changed