Split the DownloadStateCallback class into two

Use individually-registered DownloadStatusListener and
DownloadProgressListener instead to listen for download status and
progress, respectively.

Bug: 74409377
Test: cts
Change-Id: Ifd5289038ffd66eef8bd7916f5256205b49be5f9
Merged-In: Ifd5289038ffd66eef8bd7916f5256205b49be5f9