AudioDeviceBroker: remove unnecessary synchronization around onUpdatedAdiDeviceState

Commit e1dae84f introduced a potential cross deadlock between
AudioDeviceBroker and SpatializerHelper.
Removing the unnecessary synchronization on mDeviceStateLock before
calling AudioService.onUpdatedAdiDeviceState() fixes it.

Bug: 315434689
Test: build and make.
Change-Id: I97fadfa82a2c21a18a5ce14dee29774a62bd2696