Revert "Add back remaining time thanks to PA"

This reverts commit 89def31fef83dc312f589343195ba9aff0903a9d.
Revert "DownloadNotifier: Normal notification for singles"

This reverts commit cddaa47e76a5ad599d4e6e320e5d5f3661066186.
Revert "DownloadProvider: Add transfer speeds in notification"

This reverts commit 0f67cf782675435a925891040dd6d680af851bde.
DownloadProvider: Transfer speeds in notification

Change-Id: Ic7efcdfe7a329946f3b63c331064ac2f16faafeb
[2/2] DownloadProvider: DownloadManager: add support pause/resume/stop notifications

User can manually pause current download and resume to continue download remaining data of the file.
add a progressbar to show download progress. (only legacy View)
add pause/resume/stop/retry into notifications
add remaining time into notifications

Change-Id: I7c2c6043bd6e26c4d4b0c74265f87629967302a0