bug fix: output colorformat configuration fixed

The eColorFormat field in OMX_PARAM_PORTDEFINITIONTYPE structure
has no effect on the component. This has to be configured from
OMX_VIDEO_PARAM_PORTFORMATTYPE. This is corrected. This color format
information is passed to graphic buffer during its allocation

Bug: 63796949

Merged-In: I51b1e59631647d1291ecfac373781ac5e5a0ffd5
Change-Id: I51b1e59631647d1291ecfac373781ac5e5a0ffd5