sepolicy: Added support for vendor_audio_prop for audio props

Added support for vendor_audio_prop and moved all audio
properties to that type. This is done to conform with Treble
guidelines where vendor domains can access only vendor props.
Added access to only selective domains that need access to
these props.

Change-Id: Ic8999407bb77f265389ca07323099a11cf281563

vendor/common/audioserver.te

@@ -2,6 +2,8 @@ binder_call(audioserver, bootanim)
 
 allow audioserver sysfs_soc:file r_file_perms;
 allow audioserver sysfs_soc:dir search;
+# audio properties
+get_prop(audioserver, vendor_audio_prop)
 
 userdebug_or_eng(`
     diag_use(audioserver)

vendor/common/hal_audio_default.te

@@ -31,3 +31,6 @@ vndbinder_use(hal_audio)
 #allow acess to wcd_cpe
 allow hal_audio sysfs_audio:file rw_file_perms;
 allow hal_audio sysfs_audio:dir r_dir_perms ;
+
+# audio properties
+get_prop(hal_audio, vendor_audio_prop)

vendor/common/property.te

@@ -40,6 +40,9 @@ type ctl_vendor_hbtp_prop, property_type;
 # Bluetooth props
 type vendor_bluetooth_prop, property_type;
 
+# Audio props
+type vendor_audio_prop, property_type;
+
 #ss-restart
 type vendor_ssr_prop, property_type;
 

vendor/common/property_contexts

@@ -14,10 +14,10 @@ ctl.vendor.ipacm-diag      u:object_r:ipacm-diag_prop:s0
 ctl.vendor.dataqti         u:object_r:vendor_dataqti_prop:s0
 ctl.vendor.sensors         u:object_r:sensors_prop:s0
 ctl.thermal-engine         u:object_r:thermal_prop:s0
-vendor.audio.              u:object_r:debug_prop:s0
-vendor.voice.              u:object_r:debug_prop:s0
-persist.vendor.audio.      u:object_r:debug_prop:s0
-ro.vendor.audio.           u:object_r:debug_prop:s0
+vendor.audio.              u:object_r:vendor_audio_prop:s0
+vendor.voice.              u:object_r:vendor_audio_prop:s0
+persist.vendor.audio.      u:object_r:vendor_audio_prop:s0
+ro.vendor.audio.           u:object_r:vendor_audio_prop:s0
 debug.gralloc.             u:object_r:debug_gralloc_prop:s0
 debug.ramdump.             u:object_r:ramdump_prop:s0
 debug.ssrdump              u:object_r:ssr_prop:s0