"Facebook can upload the entire files of all system libraries to their server through their Android apps"
and
"I found they have already collected metadata of 2233 system libraries from my phone, in which 1162 system libraries are pending to be uploaded"
So they've already uploaded the metadata and are in process of uploading the whole files.
"Facebook can upload the entire files of all system libraries to their server through their Android apps"
and
"I found they have already collected metadata of 2233 system libraries from my phone, in which 1162 system libraries are pending to be uploaded"
So they've already uploaded the metadata and are in process of uploading the whole files.