Add 'vendor.' prefix to a vendor daemon name

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

Test: succeeded building and tested on a walleye device
Bug: 36796459
Change-Id: I652aba67e6ae8e7924df5f213172f8469b5e963f