Fix TextInputTestCase

Summary:
#22166 removed inline styles from TextInputTestModule but applied the incorrect style to some of the TextInputs - instead of setting the text color, it set the margin. This caused the test to fail because no color was applied.

Changelog: [Android] [Fixed] Fixed style in TextInputTestCase

Reviewed By: zackargyle

Differential Revision: D19912362

fbshipit-source-id: d5068114b726ee7583842e5f6f323862b0c28e44

ReactAndroid/src/androidTest/js/TextInputTestModule.js

@@ -170,7 +170,7 @@ const styles = StyleSheet.create({
     fontWeight: 'bold',
   },
   textInputColor: {
-    marginLeft: 20,
+    color: '#00ff00',
   },
 });