AudioService: fix Bluetooth codec sampling rate change

Commit 023c69fc caused a regression with Bluetooth codec sampling rate
changes by preventing the reconfiguration of the audio HAL stream.
This CL restores the call to native audio policy manager when a
Bluetooth config changed request is received and the codec parameters
actually change.

Bug: 322938249
Test: repro steps in the bug
Change-Id: Id66e9f8eca81f299ffd8906e6c55dbd8dbc70948
Merged-In: Id66e9f8eca81f299ffd8906e6c55dbd8dbc70948