lshal: --init-vintf use <fqname> only.

lshal --init-vintf helps creating the device manifest for
launch devices. For launch devices it is encouraged to use
<fqname> format.
Upgrading devices should not use this tool to generate device
manifest and replace the existing manifest directly, but should
edit the existing manifest manually.

Bug: 74247301
Test: lshal_test

Change-Id: Ifaf230a13637be9c8799291f28f48808b05fff18