SoftApManager: plumb softap mode in to SoftAPModeManager

Plumb the softap mode in to SoftApManager so the softap state change
broadcasts can also be moved.

Bug: 67511200
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Test: integration tests
Test: manually tested tethering
Test: verified LocalOnlyHotspot updates
Change-Id: I690598f39bef5dfdcbcb2a9668fcf06b34d68b46
7 files changed