Fix activity not launching from recents after it was dismissed.

When activity was launched from recents and started at the same time, we
would first try resuming activities and then focus on the started
activity. That is wrong odering, as the previously focused activity will
be resumed (in this case recents). We need to first focus on the start
activity and then request resuming.

The CL also flag protects some logging that is being very frequently
printed from activity manager.

Bug: 25823213
Change-Id: I5311fb2bf316ce3d298b30fa90fb257978bacdca