Add dither XML flag to StateListDrawable.

We currently allow the dither="true" flag to be set on
individual <bitmap> and <nine-patch> objects, but that flag
is overridden when they are included in a <selector>.  This
change adds the dither="true" flag to StateListDrawable so
they can be dithered when desired.

Fixes http://b/issue?id=2068024
2 files changed