IMS: Correctly set preview surface dimensions

If preview is to be displayed in portrait window,
set preview buffer dimensions (i.e. negotiated width/height
received with PARAM_READY_EVT) to landscape and vice-versa

CRs-Fixed: 1105902
Change-Id: Ic6fa8355d74a5a297a04cbe4b870c8605d23f48e
2 files changed