Improve scrolling cache

Scrolling cache helps make short scrolls/flings smooth but will
cause stutter when long flings are made. This patch disables
scrolling cache when long flings are made.

This patch also fixes a related bug where scrolling cache will
not be enabled properly when transitioning from flinging to scrolling.

Patch Set 2: Calculate threshold based on maximum velocity (Sang Tae Park)

Change-Id: I1fdbaad92263c9f983a32900e74eba1f0367902b
Audio: Organize, include only newer ringtones

Change-Id: I8480bab6aee378db137630262015dcd14436aa12
Remove duplicate notifications

Acrux=Antares and Bellatrix=Betelgeuse.

I'm guessing these are duplicate due to differing
names. I believe Antares and Betelgeuse are the names
in AOSP, so leaving those two.

Change-Id: Ie58b20039bb4343c9907fc5bc31e099fd942bb87
Remove references to removed notifications.

Remove references to files deleted by patch: http://review.cyanogenmod.com/#/c/16913/

Change-Id: Ic40ad7aa1cd43843effc4456c52b6c3fe52b7165