doubled volume steps for all audio streams
HALO dismiss/flip fix, clearall/last-notif-empty fix

Change-Id: I56eeb6891af2130584620d9bc596c3f0295f2402

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java
HALO first-run turorial less choppy + overlay

Change-Id: Ib33798ae6e2f36305c07556e32206d86809a8ec0

Conflicts:
	packages/SystemUI/res/values/strings.xml
derp

Change-Id: Ia8312827ede988cb754aab8cf6e3667e49f56a5a
hdpi version for 7b995b44e1b4d5e2c8219de0831c1c257152e92f