Fixed the delay for notifying IWLAN available

When WiFi toggle quickly off/on, WiFi connection is not disconnected, so no onAvailable and service state changed. Monitor WiFi toggle on event, then notify IWLAN available when WiFi toggle is turned on and IWLAN is registered.

Bug: 233342216
Test: atest QualifiedNetworksServiceTests
Test: On device WiFi toggle on/off
Change-Id: I1b6d75815018df633df7bc45a4ec861c13c61f4f
3 files changed