DownloadNotifier: Normal notification for singles (PS 6)

This builds upon the previous DownloadNotifier, but changes the notification style
when downloading single files by removing the big view.
See this post for more information:
https://plus.google.com/u/0/+Mart%C3%ADndelRosarioOK/posts/hgGcgsFqyp6

PS2: Fixing dependencies
PS3: Removing tabs/whitespace
PS4: Fix missing speed text after last patchset.
PS5: Restore previous change, fix missing time this time.
PS6: Reformat layout

Change-Id: Iaab38d7e7f9de3d9eb3deb5f061ee646b346c7cc

Conflicts:
	src/com/android/providers/downloads/DownloadNotifier.java