Fixed NPE in FingerprintAuthClient

Test: It builds.
Bug: 193883067
Change-Id: I3c310ab6a631750377a069e926567279bedc9d3b
Merged-In: I3c310ab6a631750377a069e926567279bedc9d3b
(cherry picked from commit 78893c23173aea599c3cadd6a4ab7506ae3919ac)
DO NOT MERGE
1 file changed