This merge request is about adding additional filtering option to generic drm importer, and adding LCD panel.
I have finished the effort around adjusting IMG handle from the internal type to gralloc_handle_t.
As was noticed - additional filtering of non hwfb handles can be required for generic drm importer. This option was added so that the default behavior is not changed unless hwc.drm.exclude_non_hwfb_imports option is set to non-zero value.
LCD panel (represented as DRM_MODE_CONNECTOR_DPI) was added for Texas Instruments LCD boards support.