Added the SELinux rule for the EdgeTPU vendor service.

To comply with the GSI compliance test, this change
splits the compiler part of the edgetpu_service into a
separate edgetpu_vendor_service under vendor.

The edgetpu_service locates under /system_ext/ and used
to be connected by both applications and vendor clients.
With this change, vendor clients could talk to the vendor
part of this service directly without having to cross
the system and vendor boundary.

Applications will still talk to the system_ext one, which
will forward the requests to the vendor service.

Bug: 185432427
Test: tested on Oriole + GCA.
Change-Id: I1ee47946f1fc3694d5f8b5325c192d6bd720a76e
7 files changed