Move Spare Parts icon to mipmap

So that the different icon densities don't get stripped out of the build
by aapt, move it to the mipmap directory.

This will ensure that any program using the getDrawableByDensity API can
read any density/size of the icon needed.

Change-Id: I48c27f7a8b115365c5827ddaa9e8710f3b81358e
3 files changed