New photo to be set as group profile photo.
inputChatUploadedPhoto#c642724e flags:# file:flags.0?InputFile video:flags.1?InputFile video_start_ts:flags.2?double = InputChatPhoto;
|flags||#||Flags, see TL conditional fields|
|file||flags.0?InputFile||File saved in parts using the method upload.saveFilePart|
|video||flags.1?InputFile||Square video for animated profile picture|
|video_start_ts||flags.2?double||Timestamp that should be shown as static preview to the user (seconds)|
Saves a part of file for further sending to one of the methods.