tree 2dc3e3b1e7c09b85643ff1a7504fbbc0e917eb79
parent c41a5d6bc0f3e6848d09ac27399cc4f989c3de00
author Janis Danisevskis <jdanis@google.com> 1539189159 -0700
committer Janis Danisevskis <jdanis@google.com> 1539273649 -0700

KeyguardStateMonitor looses connection with keystore if keystore dies

When keystore dies it no longer gets information about the lock screen
visibility state. This state is vital to enforcing the "unlocked
device required" authorization of keymaster keys.

With this patch KeyguardStateMonitor tries to reestablish the connection
to keystore if communication fails.

Test: run atest android.keystore.cts.CipherTest#testKeyguardLockAndUnlock
      after killing keystore
Bug: 117552147

Change-Id: I8346e53c342bdba0f5960b1feba7c26db5cef33e