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: 7582c089
am: 407cde0f
Change-Id: If6e4ff8fd3d8ae777823c7b6cc46d49e3f242153