Remove the resetting of qp params for temporal layers.
The ambient qp and active worse/best qp were reset for every frame when temporal layers is on. This change removes this reset. As this affects the target size for forced key frames (it will actually lower the size somewhat), we increased the inital boost factor to compensate. Change-Id: Ie38d95f5c99ab3d447469c49e2177bc3fcc4ad28