Allow no ro.vendor.fingerprint

Some older device don't have that property so ensure that
we only check it if it was available in retry.

Test: unit tests
Bug: 138173477
Change-Id: I3a5c3c18b86a41ae2221d4c2a8b6448e3bb77a04
1 file changed
tree: ce2be62f4ac246d251d6daec23367544499163c7
  1. build/
  2. common/
  3. tools/
  4. OWNERS
  5. PREUPLOAD.cfg
  6. test_defs.sh