[2/2] DownloadProvider: DownloadManager: add support pause/resume/stop notifications

Change-Id: I2df422a7c905f3578c1eda8629fcd3557f892e78

Conflicts:
	src/com/android/providers/downloads/DownloadNotifier.java
	src/com/android/providers/downloads/DownloadThread.java
Change to make new drawables take effect

See this commit - http://gerrit.dirtyunicorns.com/#/c/2469/1

Change-Id: I1ec0e46b1cfbc1c08f0190c3a0caabdfc95a3496