sepolicy: change vendor property to system property
1. Add surfaceflinger_display_prop property context
2. Set context for graphics.display.kernel_idle_timer.enabled
3. Context for system property that is get by surfaceflinger
and set by vendor_init and system_app.
W /system/bin/init: type=1107 audit(0.0:5): uid=0 auid=4294967295 ses=4294967295 subj=u:r:init:s0 msg='avc: denied { set } for property=vendor.display.enable_kernel_idle_timer pid=2396 uid=1000 gid=1000 scontext=u:r:system_app:s0 tcontext=u:object_r:vendor_display_prop:s0 tclass=property_service permissive=0'
Bug:137064289
Test: $ make selinux_policy. Check kernel idle timer works correct.
Change-Id: I77a82b5abfe5a771418dab5d40b404a1cdca4deb
diff --git a/private/surfaceflinger.te b/private/surfaceflinger.te
index cf709df..36c39d6 100644
--- a/private/surfaceflinger.te
+++ b/private/surfaceflinger.te
@@ -58,6 +58,9 @@
set_prop(surfaceflinger, exported3_system_prop)
set_prop(surfaceflinger, ctl_bootanim_prop)
+# Get properties
+get_prop(surfaceflinger, surfaceflinger_display_prop)
+
# Use open files supplied by an app.
allow surfaceflinger appdomain:fd use;
allow surfaceflinger { app_data_file privapp_data_file }:file { read write };