Use new profile picture endpoint

SignalServiceKit/src/Loki/API/LokiStorageAPI.swift

@@ -211,11 +211,11 @@ public final class LokiStorageAPI : LokiDotNetAPI {
     public static func setProfilePicture(_ profilePicture: Data) -> Promise<String> {
         return Promise<String>() { seal in
             getAuthToken(for: server).done { token in
-                let url = "\(server)/files"
+                let url = "\(server)/users/me/avatar"
                 let parameters: JSON = [ "type" : attachmentType, "Content-Type" : "application/binary" ]
                 var error: NSError?
                 var request = AFHTTPRequestSerializer().multipartFormRequest(withMethod: "POST", urlString: url, parameters: parameters, constructingBodyWith: { formData in
-                    formData.appendPart(withFileData: profilePicture, name: "content", fileName: UUID().uuidString, mimeType: "application/binary")
+                    formData.appendPart(withFileData: profilePicture, name: "avatar", fileName: UUID().uuidString, mimeType: "application/binary")
                 }, error: &error)
                 request.addValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
                 if let error = error {
@@ -233,7 +233,7 @@ public final class LokiStorageAPI : LokiDotNetAPI {
                         print("[Loki] Couldn't upload profile picture.")
                         return seal.reject(Error.generic)
                     }
-                    guard let json = responseObject as? JSON, let data = json["data"] as? JSON, let downloadURL = data["url"] as? String else {
+                    guard let json = responseObject as? JSON, let data = json["data"] as? JSON, let profilePicture = data["avatar_image"] as? JSON, let downloadURL = profilePicture["url"] as? String else {
                         print("[Loki] Couldn't parse profile picture from: \(responseObject).")
                         return seal.reject(Error.parsingFailed)
                     }