tree c7bb892a86fc9c9fe3f3c1b9447fa1ecd8b36897
parent 64be26fad743ae1d8b5f8e5c61b2e7db18379f8b
author Jeff Sharkey <jsharkey@android.com> 1381510143 -0700
committer Jeff Sharkey <jsharkey@android.com> 1381510145 -0700

Treat dates near epoch as unknown.

Also document that rootIds need to be stable, so removable media
roots should use the media serial number.

Bug: 11151557
Change-Id: I1f3dcabcd0474f1bf92d2cafb0f37e82abe34e05