msm: vidc: add support for dynamic flip

Video usecase may need to configure flip during the
encode session. Add the support so that flip can be
enabled dynamically.

CRs-Fixed: 2485558
Change-Id: I16fccbc1c3e1285e36657885a3807b7ce688e750
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>