am b44051ee: Merge "ADT/Layoutlib: implement sweep gradient." into eclair

Merge commit 'b44051eee04450888a7dcb1cd2e6f31d0edfb678' into eclair-plus-aosp

* commit 'b44051eee04450888a7dcb1cd2e6f31d0edfb678':
  ADT/Layoutlib: implement sweep gradient.