Hearing Aid Service: Don't sent suppress noisy intent

1) When the active device is change to other device, don't send suppress
noisy intent
2) When the active device is change to null, will check the connection
state, if it is disconnected will sent intent.

Bug: 112279820
Test: Build Pass, BT off/on when play A2DP, Switch active device
Change-Id: I80cbf8180b68c671657fd3b9375ee78ea15b47eb
Merged-In: I80cbf8180b68c671657fd3b9375ee78ea15b47eb
Merged-In: I645b7999c2921974dd3e0c31a832e40fe203ba0c