Rescaled drawables for MDPI (fix Google's mistake)

Google messed up when scaling down a bunch of the drawables for Gingerbread.

In what looks like an attempt to preserve detail in the statusbar notification drawables they seem to have batch scaled them all using 'Nearest Neighbor' which destroys any kind of angled shape, resulting in a pixelated mess.

I rescaled them from the HDPI drawables using more sane settings, manually removing any slight scaling artifacts when they arose. The files listed below could use some manual love though since rescaling them the normal way produces too many artifacts. Needs to be scaled down by hand (Transform -> Scale).

stat_notify_sync.png
stat_notify_sync_anim0.png

According to this screenshot by attn1 there might be something wrong with the files below too. Possible in the standard layout, forcing Android to scale them down.

http://i.imgur.com/S4MMy.png

expander_ic_maximized.9.png
expander_ic_minimized.9.png

Change-Id: I03f03150908cc795fb18a1bc6651b7fe12c949f8