mm-video: vidc: Reset state of H263 parser on reconfig

State is mantained across reconfigs in the frame_parse class, but the
object is allocated in stack memory so we can't just free. This adds
a reset function that is called on original buffer allocation to reset
the frame parser.

Change-Id: Ibc3516f24bd97ca7da780dde8cda2c4f84f7991a
CRs-fixed: 515586
3 files changed