Displayable fingerprint computation depends on platform character set

[mmdriley]

This call to String.getBytes() should probably be replaced with getBytes(StandardCharsets.UTF_8) or getBytes(Charset.forName("UTF-8")).

Thankfully this seems to default to UTF-8 on Android anyway, though it's still worth being explicit: http://stackoverflow.com/questions/2207631/android-default-character-encoding

[moxie0]

There are many calls to getBytes() throughout the entire codebase which do not specify a character encoding. We've always depended on UTF8 being mandatory and default on Android. Maybe one day we'll go through and make them all explicit.