Add dumpsys network_stack version

This is necessary to allow testing for the network stack version and the
version it is getting from the system server.

Test: flashed, WiFi working
Test: dumpsys network_stack version shows data (although version numbers
      being fixed)
Bug: 133124190

(clean cherry-pick from qt-dev)
Change-Id: If5114ee2b02408cf96f86efaec2c420ccc5e330a
Merged-In: I9ea85c29667d4510225637071990732360841db6