am b876bdb5: Merge "Speed up layers rendering when using animations Cherry-pick from master" into froyo

Merge commit 'b876bdb52e7c72ced8e7764946e5beb914f17036' into froyo-plus-aosp

* commit 'b876bdb52e7c72ced8e7764946e5beb914f17036':
  Speed up layers rendering when using animations