Get your own cursor Drawables, WebViewClassic!

These are shared resources! You can't just animate *everyone's*
cursors!

This is a hand-merge of Icdc86af4fba427a352019cd3e2017f97a3b9fdba
from jb-dev branch. I'm not sure why it wouldn't automerge, as it
seemed pretty straightforward...

Bug: 7110290
Change-Id: I131a611b9e16699a51d3769658f079c2ae4cf262