SoftApManager: move ap state change bcast to ap manager

Move the soft ap state change broadcast in to SoftApManager.

Bug: 67511246
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Test: integration tests
Test: verified LocalOnlyHotspot callbacks still work as well
Change-Id: I1e8b9afb7d42c38b7572ad701e4def9534b33668
5 files changed