Rename android.util.TimestampedValue to android.os to avoid dependency
from android.util onto android.os, which is disallowed by lint.
Bug: 147012511
Test: boot
Merged-In: I4b84db03c8ad24bbef63e45d6d15fb306a10364e
Change-Id: I4b84db03c8ad24bbef63e45d6d15fb306a10364e
(cherry picked from commit d159015e54)