Add attribution for vector drawable

Forgot attribution for vector drawable obtained from
http://google.github.io/material-design-icons/

Ticket CD-592

Change-Id: I7a6cf5bce22f64e819ea5af65bc97a46afe1d59b
1 file changed
tree: ae818e3cb85cd58d2e12c5d294782a36b9203ea3
  1. res/
  2. src/
  3. tests/
  4. .gitreview
  5. proguard.flags