Add the API docs for assembling build service.
Add the API docs for assembling build service.

genedna/containerops,Lupino/containerops,genedna/containerops,crystaldust/containerops,imlidian/containerops,Lupino/containerops,Huawei/containerops,crystaldust/containerops,imlidian/containerops,Huawei/containerops,Lupino/containerops,genedna/containerops,imlidian/containerops,imlidian/containerops,Lupino/containerops,Huawei/containerops,genedna/containerops,genedna/containerops,imlidian/containerops,Huawei/containerops,Lupino/containerops,crystaldust/containerops,crystaldust/containerops,Huawei/containerops,imlidian/containerops,imlidian/containerops,genedna/containerops,genedna/containerops,crystaldust/containerops,Lupino/containerops,Huawei/containerops,crystaldust/containerops,Huawei/containerops,Lupino/containerops,crystaldust/containerops