Increase timeout in RTCUIApplicationStatusObserver

Increase timeout since the wait function timed out in certain debugging
circumstances. Also change the check to a DCHECK since it is not really
a critical error if it would time out.

BUG=None

Review-Url: https://codereview.webrtc.org/3007773002
Cr-Original-Commit-Position: refs/heads/master@{#19582}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: cfab6c7c04e3480c9dba32ca86a33428cea6ea34
1 file changed