Update Nfc system config search rule

1. If prop_config_file_name is defined.
   (where prop_config_file_name is the value of the
   property (persist.nfc_cfg.config_file_name)
   Search a file matches prop_config_file_name.
2. If SKU is defined (where SKU is the value of the property
   ro.boot.product.hardware.sku)
   Search a file matches libnfc-nci-SKU.conf
3. If none of 1,2 is defined, search the default file
   "libnfc-nci.conf".

Bug: 148056494
Test: set property and load target files.
Change-Id: Ia3e93cf573c600a9136cb59b659539bb35b310dc
1 file changed