vp9-aq-mode=3: Reset cyclic refresh under config/external size change.
If the application changes frame size (external size changes), and aq-mode=3 is on, reset the cyclic refresh. Modify the TestExternalResize unittest (longer run with more resize actions). Without this change an assert would be triggered on this longer test. Change-Id: I0eefd2cd7ffa0c557cca96ae30d607034a2599ce