mm-video: vidc: do not unmap buffer handles in secure mode

In secure mode, output buffer handles are stowed with gralloc
handles and do not have mapped pointers. In free, this should
not be unmapped.
For input case too the ion fds should not be unmapped while
freeing in secure mode.

Change-Id: I0ea8d19d8dc7bd0e5c51a06d32497891476e375f
CRs-Fixed: 465905
1 file changed