Don't dump print state while holding lock

This causes ANRs as we are trying to the the print spooler connection
while holding a lock that can also be aquired on the system server's
main thread.

Fixes: 63159459
Test: cts-tradefed run singleCommand cts-dev -m Print
      adb shell dumpsys print
      incident_report print
Change-Id: I228fc5ddc10c1c89f61e8a6d8eb8ea9e384197a8