Allow method chaining on setters

Return "this" from the setter functions so that the methods can be
chained.

Change-Id: I5b03f1a9f265af451f5b1807347007569483b580
Use the view size to restrict NIV requests.

Change-Id: Ib09a68c815f147ade31233d03267df687d8341e0
Merge "Use the view size to restrict NIV requests."
Add a basic test for NetworkImageView

Change-Id: I07208cba4c207c3378500fb9e37ac6198ee7dc8d
Merge "Add a basic test for NetworkImageView"
Merge "Allow method chaining on setters"
Merge branch 'master' of https://android.googlesource.com/platform/frameworks/volley

Conflicts:
	src/com/android/volley/Request.java
	src/com/android/volley/toolbox/NetworkImageView.java