Increase Timeout for dequeue message

In vp9 encoder component, the callback responses are being recevied
after timeout. This is seen only in vp9. Even when no buffer processing
is done, Flush test, state transitions test fail due to slow responses.
This behavior is not seen in other components. This requires deeper
understanding of what is main culprit. But for now increase the timeout

Test: VtsHalMediaOmxV1_0Host
Bug: 37501531
Change-Id: I08abfefcf0cb38d312a4a2dc10908e24f88c54fd