Add rules for accessing the related bluetooth_audio_hal_prop

This change allows those daemons of the audio and Bluetooth which
include HALs to access the bluetooth_audio_hal_prop. This property is
used to force disable the new BluetoothAudio HAL.
  - persist.bluetooth.bluetooth_audio_hal.disabled

Bug: 128825244
Test: audio HAL can access the property
Change-Id: I87a8ba57cfbcd7d3e4548aa96bc915d0cc6b2b74
diff --git a/private/system_app.te b/private/system_app.te
index 38e7938..9a5e455 100644
--- a/private/system_app.te
+++ b/private/system_app.te
@@ -32,6 +32,7 @@
 
 # Write to properties
 set_prop(system_app, bluetooth_a2dp_offload_prop)
+set_prop(system_app, bluetooth_audio_hal_prop)
 set_prop(system_app, bluetooth_prop)
 set_prop(system_app, debug_prop)
 set_prop(system_app, system_prop)