HALO persistent notifications less pronounced + fixes

Change-Id: Ib485468303dfd7ca7fea17d7c755a3ee4e075940

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java