AOSP/Messaging - Update language to comply with Android's inclusive language guidance.

See https://source.android.com/setup/contribute/respectful-code for reference

BUG=161896447

Test: make and make messagingtests
Change-Id: I01c520f1d5e9eab8dbb25b08d133ae34bd301093
diff --git a/jni/GifTranscoder.cpp b/jni/GifTranscoder.cpp
index 9169f1b..324d315 100644
--- a/jni/GifTranscoder.cpp
+++ b/jni/GifTranscoder.cpp
@@ -173,7 +173,7 @@
                     return false;
                 }
 
-                // Sanity-check the current image position.
+                // Check the current image position.
                 if (gifIn->Image.Left < 0 ||
                         gifIn->Image.Top < 0 ||
                         gifIn->Image.Left + gifIn->Image.Width > gifIn->SWidth ||