wifi: Add new callback to support use case in bridged mode

In bridged mode, it needs the way to know connected client and info in
each instance. Add callback onConnectedClientsChangedWithApInfo to
provide the link between clients and info

1. onConnectedClientsChanged(SoftApInfo, List<WifiClient>)
2. onInfoChanged(List<SoftApInfo>)

PS: This CL# also refactoring the callback in service side.
Move to Manager side to handle it.
Service side:
onConnectedClientsOrInfoChanged, integrate 4 callbacks to
one callback and pass all of the current infos to Manager.

PS: Convert one callback to 4 callback in Manager side will in another CL#.
Now only handle onConnectedClientsChanged in single AP mode to avoid
block AOSP Setting/SystemUI usage.

Manager side: (public systemApi)
1. onInfoChanged(SoftApInfo)
2. onInfoChanged(List<SoftApInfo>)
3. onConnectedClientsChanged(SoftApInfo, List<WifiClient>)
4. onConnectedClientsChanged(List<WifiClient>)

AP+AP Part 6 includes:
Support dual SoftApInfo callback
   a. New callback onInfoChanged(List<SoftApInfo>) &
      onConnectedClientsChanged(SoftApInfo, List<WifiClient>)
   b. Callback refactoring
   c. Support shutdown idle instance in bridged mode

Bug: 162686273
Test: FrameworksWifiApiTests
Change-Id: I861ad4ece908ec98fd500b249906ee73fff0a72a