base

Demote the log in ProcessState.ensureNotDead from a wtf to a warning.

It's raising alarm bells but there isn't much we can do without a lot
of rewriting inside the ActivityManager.  The only consequence is stats
that are off by a little bit.

Bug: 28581070
Change-Id: If51568c3a708a907ceef6452e7d45599a57454f7