Rename exported3_radio_prop to radio_control_prop

The context name exported3_radio_prop is ambiguous and does not reflect
the usage and role of the properties. This changes its name to
radio_control_prop.

Some downstream branches are still using exported3_radio_prop, so
get_prop(domain, radio_control_prop) is added to avoid regression. It's
just a workaround and to be removed soon, after all exported3_radio_prop
are cleaned up.

Bug: 162214733
Test: boot a device with a sim and see basic functions work
Change-Id: If5fe3be7c64b36435c4ad0dc9a8089077295d502
Merged-In: If5fe3be7c64b36435c4ad0dc9a8089077295d502
diff --git a/private/property.te b/private/property.te
index cabd06b..a068799 100644
--- a/private/property.te
+++ b/private/property.te
@@ -164,7 +164,7 @@
     -hal_telephony_server
     -vendor_init
   } {
-    exported3_radio_prop
+    radio_control_prop
   }:property_service set;
 
   neverallow {