build.gradle - added tests config, cosmetic changes.
Merge "build.gradle - added tests config, cosmetic changes."
NetworkImage - fix nullPointerException.

1. getLayoutParams() can be null.
2. old version used LinearLayout.LayoutParams instead of ViewGroup.LayoutParams
Merge "NetworkImage - fix nullPointerException."
Merge branch 'master' of https://android.googlesource.com/platform/frameworks/volley
Custom modifications to the library :

- Allow target dimensions to be set in NetworkImageView
- Don't treat non 5xx responses as errors.