Namespace ril service and properties with "vendor."

To prevent property name collisions between properties of system and
vendor, 'vendor.' prefix must be added to a vendor HAL service name and
vendor-specific properties.
You can see the details in http://go/treble-sysprop-compatibility.

These are applied only if PRODUCT_COMPATIBLE_PROPERTY is true.

Bug: 36796459
Bug: 73871799
Test: succeeded building and tested on a taimen device
Change-Id: I45ce47a0f6768bc3f088450a8b4680801a96db7e
Merged-In: I45ce47a0f6768bc3f088450a8b4680801a96db7e
(cherry picked from commit 83035b57fc6f63f4e80c3a424f09a867150e3bbe)
diff --git a/rild/rild.rc b/rild/rild.rc
index b27e1da..f6beb54 100644
--- a/rild/rild.rc
+++ b/rild/rild.rc
@@ -1,4 +1,4 @@
-service ril-daemon /vendor/bin/hw/rild
+service vendor.ril-daemon /vendor/bin/hw/rild
     class main
     user radio
     group radio cache inet misc audio log readproc wakelock