am b94493fe: Merge "Document blocking behavior of ImageView setImageURI and setImageResource" into gingerbread

Merge commit 'b94493feaf8b7a620a25c23c1f131a999ed61293' into gingerbread-plus-aosp

* commit 'b94493feaf8b7a620a25c23c1f131a999ed61293':
  Document blocking behavior of ImageView setImageURI and setImageResource