am 6866daee: Merge "ADT/Layoutlib: implement radial gradient." into eclair

Merge commit '6866daee6a18992e8f2c9a948e873bbfc2090fb0' into eclair-plus-aosp

* commit '6866daee6a18992e8f2c9a948e873bbfc2090fb0':
  ADT/Layoutlib: implement radial gradient.