Fix encryption on Nakasi

We need to make sure we don't try to read the flags on keymaster
version 2 or below, or we get random junk.

Requires
  https://googleplex-android-review.git.corp.google.com/#/c/460689/

Bug: 14384714
Change-Id: I5a4ede1bec0347b8319cedaae6535201c122cf48
1 file changed