Fix display condition for minutes.

Previous display: 2 hours 0 mins
Now displayed: 2 hours

Change-Id: I4f428e2b16063ab285d25c33eb6ebe2c6f769d2e
Fix threads running after entering call log, possibly affecting battery
life.

When having entered the call log or the call stats activities once, the
contact lookup thread (which wakes once per second) continued to run
even after leaving the activity.
The root cause for that was that the ViewTreeObserver obtained at
registerOnPreDrawListener() time was no longer valid when
unregisterOnPreDrawListener() was called. Fix that by storing a
reference to the observed view instead of the observer and fetching the
current observer when needed.

Change-Id: I3209712a52371f99772f522d03bc6b209272089c
Added hungarian translation for Call statistics

Change-Id: If95add4d71767d7a62b2e04b4240bd9ae6d058db
es_ES: Added spanish translations for call statistics

Change-Id: Ie4fb939e5786e9504ea789cfdb42220e6d149fe9
Contacts: Hebrew translation updates

Change-Id: I842e26ef99425738d017c1ce307064239e93e8bb