hal_audio: In binderized mode hal_audio needs access to IAllocator

This is to ensure that hal_audio can access memory shared by
audioserver.

Bug: 34261005
Change-Id: I84103b0d4692fd10afc56846fb116fec6a7b3dc7

public/hal_audio.te

@@ -2,6 +2,7 @@ hwbinder_use(hal_audio)
 binder_use(hal_audio)
 binder_call(hal_audio, audioserver)
 binder_call(hal_audio, system_server)
+hwallocator_use(hal_audio)
 
 allow hal_audio ion_device:chr_file r_file_perms;