Refine the property that audio HAL uses to not select the new HAL

Use single property to force disable the Bluetooth Audio HAL, the newer
is the same with the Bluetooth stack and the audioserver.
   - persist.bluetooth.bluetooth_audio_hal.disabled

Bug: 128825244
Test: check audioserver / audio HAL and the Bluetooth stack can work
Change-Id: I8d963a3ed90dea4825d8e1cf44e6357c72618673