Add vendor/etc to config search path

libnfc-nci.conf has hardware specific configurations.

Hardware dependent module should be placed in vendor or odm partition.
But a device launched with N or O, it might not have odm partition.

If the config exists in vendor partition,
it should be allowed to load from there.

Bug: 72080121
Bug: 77544383
Test: Put libnfc-nci.conf in vendor/etc and load the conf
Change-Id: I73158c3c8706f08e844ca81a801c887472b7882b
1 file changed