Expand ImsPhoneCall logging and add updatePhoneState check.

Analysis of the logs for the associated bug has not revealed any reason
why that bug has happened.

1. Added a speculative fix to ImsPhoneCallTracker#updatePhoneState to
ensure that any pending MO call is also not idle when considering the
state to be off hook.
2. Added more logging to ImsPhoneCallTracker, and ImsPhone to help diagnose
the issue.

Bug: 31000943
Change-Id: I0713a7bd6e5c91fc458e67af530de0bcce8a7aee