In v1.0 API I was able to get friends with their facebook ID like this:
{
\"name\": \"Somename SomeSurname\",
\"id\": \"100007797060798\"
}
may be you can get id by search people with the same picture.
me?fields=taggable_friends{name,picture}
{
"name": "ปาณิศา หลานตากอย.ตาแก้ว คงเพ็ชร",
"picture": {
"data": {
"url": "https://fb-s-c-a.akamaihd.net/h-ak-fbx/v/t1.0-1/p100x100/19113605_1931156107168776_605762913793659652_n.jpg?oh=951c7c13a85b0ce3abe8a6e7bacae127&oe=59DA354A&__gda__=1508078042_6baaa5dc05f7b1e85f7a90e8c21e517b"
}
},
"last_name": "คงเพ็ชร",
"first_name": "ปาณิศา",
"id": "AaKW3BwqCsT_4IspPO5jlFZet-4LnXQfulxsumuI-4Mel7M-0cTX-7gbARaOJSy7JMbLDBcwCEMdBvJQmZ7-YNEN-o_EDpugQfY02UqjED_uvQ"
}
then
search?type=user&q=ปาณิศา หลานตากอย.ตาแก้ว คงเพ็ชร&fields=id,name,picture
"data": [
{
"id": "1519971271620597",
"name": "ปาณิศา หลานตากอย.ตาแก้ว คงเพ็ชร",
"picture": {
"data": {
"is_silhouette": false,
"url": "https://fb-s-c-a.akamaihd.net/h-ak-fbx/v/t1.0-1/p50x50/19113605_1931156107168776_605762913793659652_n.jpg?oh=21c44649424500928d0299291414f1aa&oe=59A27344&__gda__=1508317043_a83bb236c462cd9d179f8e949cea801f"
}
}
}
]
the two results have same url filename 19113605_1931156107168776_605762913793659652_n.jpg then you can get id from search result 1519971271620597