Add a test for decoding a gif with sampleSize 4.

Prior to https://codereview.chromium.org/1085253002/, this would crash.

Only happens with interlaced gif images with an odd height. (Maybe
there are more restrictions?)

Test image provided by zoran.jovanovic@sonymobile.com for checking in.

Add include before includes.

Review URL: https://codereview.chromium.org/1091053002
2 files changed