Gearhead samples were moved from /developers/demo to developers/samples. This
CL is to remove them from the old location.
Change-Id: I1b8ee3f761d75767c471c11962e429c96fff4100
Use material icons and colors;
Removed dependence on support libraries;
Added album art cache;
Bug: 17755718
Change-Id: I3085aa3e154393c3b0287783600f7187f7e42c7a