tree ebd65bc53722b2eec2656922eafd658b49b1e547
parent 2ff5824741876e5dcd0038b8ff8d75802bdc8b84
author Jim Miller <jaggies@google.com> 1490226010 -0700
committer Jim Miller <jaggies@google.com> 1490226367 -0700

Add more robust handling of daemon crashes

It seems the new fingerprint daemon doesn't recover as quickly as before
and there's a finite chance reconnecting immediately will fail.

This changes the framework to be more robust about recovering by:

1. explicitly connecting to the daemon in isHardwareDetected()
2. ensuring we remove the current client when daemon death is detected
3. reset the daemon whenever we get HW_UNAVAILABLE so we try again

Test: manually kill daemon and verify FingerprintService reconnects

Partial fix for bug 36181191

Change-Id: Id530ed62be58b33af5b5b60083f3a69e4e8cd8bf