Before this change isToday() would stop working in Y2038 because android.text.format.Time doesn't work after Y2038. This commit fixes the code by using java.time classes that are Y2038 safe. Bug: 16550209 Test: atest android.text.format.cts.DateUtilsTest Change-Id: Ied339a694819c308add8645c7434b645dc1ccdde