Convert some users of Time.format() to an alt.

Convert some frameworks/base/ users of android.text.format.Time.format()
to use calculations based on java.time instead. This avoids future
Y2038 issues associated with Time. A TimeMigrationUtils method is
added that has similar localization behavior to Time's format() method.

This commit only contains a replacement for basic formatting usecases.
Later commits can handle more complex usecases.

The only case that modifies the format is the changes to
CalendarContract.java: the pattern used there was unusual and only
used in logging/debug logic which was switched off by default.

Bug: 16550209
Test: build / boot / treehugger
Test: atest FrameworksCoreTests:android.text.format.TimeMigrationUtilsTest
Change-Id: Ib142979858012bb766b4c107d41a21b0324de506