init: check for verifiedbootstate in properties

This check in export_oem_lock_status happens after PropertyInit() so
all of the ro.boot.* properties will be set. There is no need to import
the kernel cmdline again.

Test: build and boot cuttlefish
Bug: 173815685
Change-Id: I5df7c0105566d4617442dbb8e77eb26e465775f1