Revert "Download: add to support pause/resume download by manual"

This reverts commit b76a3bd53a8b136b63624df87046bcf368bf01c4.

Change-Id: I7f2ba6493a45655b6ff24b32352b781f54af6359
[1/2] Add to support pause/resume download

We add pause and resume API here so that application can
pause and resume downloads manually by DownloadManager.
This contains two points:
1. add pause and resume download APIs.
2. add another paused reason for this download status.

PS2/3:
* Fix code.

Change-Id: I7f01aa3890589272cd2e03d474771ed9619df2d3
Merge "Revert "Download: add to support pause/resume download by manual"" into kk4.4
Merge "[1/2] Add to support pause/resume download" into kk4.4
frameworks: rebase torch intents inline with Torch upgrade

Change-Id: I9fbaee132086052eaf64f811fd26b8d25ebe0a05
Merge "frameworks: rebase torch intents inline with Torch upgrade" into kk4.4