[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
Intensify Red mdpi
(Thanks Cl3kener & Hellybean)
Redify Switches

(Thanks Cl3kener and Hellybean)
Fix DownloadManager
Merge branch 'test2' of https://github.com/AxxionKat/android_frameworks_base into HEAD