mipmap WIP
Merge remote-tracking branch 'koush/mipmap' into cm-11.0
wip

Change-Id: I83fbc94ecae9a4fa5f3c2c05cd6fe231a580fff9
Merge remote-tracking branch 'koush/wip' into cm-11.0
ImageView: support cancelling downloads in progress.

Change-Id: I0032d32874c8dfd9ab578e0f515cf907884d4f76