anv/image: Replace bo_is_owned with from_gralloc (v2)

anv/image: Replace bo_is_owned with from_gralloc (v2)

The name anv_image_plane::bo_is_owned will be made ambiguous by the
implementation of VK_EXT_image_drm_format_modifier, which may bind the
plane to multiple bo's.

Also, bo_is_owned was set if and only if the image was imported from
gralloc, and it was set only on the first plane. Therefore, let's rename
the field to from_gralloc, and move it to the toplevel of anv_image.

v2: Fix build in anv_android.c.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8097>