Add SoftApManager class

The newly created class is responsible for managing soft AP
instance and tethering state transitions.

This class will be integrated to WifiStateMachine in an upcoming
CL, which will remove the existing soft AP and tethering related
code from WifiStateMachine.

Bug: 26876260
TEST=runtest frameworks-wifi

Change-Id: I25568649b8c9d18ce78019dac614bafb9c5a3448
5 files changed
tree: bb648eb597ef81cb33ec9ac66a6d79c7fef0c238
  1. service/
  2. tests/