Add another purchase button that uses a key which isn\\\'t invalidated even if...
Add another purchase button that uses a key which isn\\\'t invalidated even if a new fingerprint is enrolled. am: 8b0db26f am: 27a0e2be
am: 20c18f6e
Change-Id: I79b362e2c99e68a84f8d96d72205afb0ef8540aa