[NAN] Re-configure NAN HAL callbacks whenever Wi-Fi is disabled/enabled.

The NAN callbacks need to be re-configured whenever Wi-Fi is shut down.

Test: run WifiNanManagerTest.py / test_nan_discovery_session multiple times
with Wi-Fi auto-disabled (by test script) between runs. Confirmed that
callbacks are called on subsequent runs.

Bug: 27880727
Change-Id: I34748e365b45ad0f92fa049f699b9c83e884b57b
2 files changed
tree: 0d8cf2e291d48218ae5d199e48b079b7e3857b4b
  1. service/
  2. tests/