Build Fixes
[1/2] Base: DownloadManager: add support pause/resume/stop notifications

Add pause, resume and stop functions to make user can pause, resume and stop downloads by manual in downloads application.

Change-Id: I82ffff5a539448faab8933e2b47591199bf24cb9

Conflicts:
	core/java/android/provider/Downloads.java
Revert "[1/2] Base: DownloadManager: add support pause/resume/stop notifications"

This reverts commit 48fd1fa0531b9ffaddf892b70a7a3f7337e8e1b0.