Display full year if precision is to high

The original idea was to show the full ISO timestamp to be sure no
information is lost. This may happen now, e.g. "0001-12-31" with precision
set to century just outputs "1". Month, day and time may get lost. At the
moment I don't think this will be a problem.

Bug: 67604
Bug: 71289
Bug: 71956
Change-Id: I905f283a545d1d9b4cd55294c545a0a4d50d2b5c
Merge "Display full year if precision is to high"