You have to set a more specific MIME type or a list of them, but you
have to keep in mind that the ACTION_GET_CONTENT intent won't work with the
latest Google Drive version starting from Android Kitkat. In order to get
files from Drive you have to use the Google Drive API or use the storage
access framework (SAF). Using SAF however it could be not what you want
because it allows the user select other sources and not only Drive.