Rename colorTextError to colorError for consistency with FW

Bug: 33829062
Test: ./gradlew support-design:connectedCheck --info --daemon -Pandroid.testInstrumentationRunnerArguments.class=android.support.design.widget.TextInputLayoutTest
Test: visual inspection
Change-Id: I518d47ae98a5a01bcebaf0b135004f1f6b8ff429
diff --git a/design/res/values/themes.xml b/design/res/values/themes.xml
index af9d583..a7bd92d 100644
--- a/design/res/values/themes.xml
+++ b/design/res/values/themes.xml
@@ -28,9 +28,13 @@
         <item name="bottomSheetStyle">@style/Widget.Design.BottomSheet.Modal</item>
     </style>
 
-    <style name="Theme.Design" parent="Theme.AppCompat" />
+    <style name="Theme.Design" parent="Theme.AppCompat">
+        <item name="textColorError">?attr/colorError</item>
+    </style>
 
-    <style name="Theme.Design.Light" parent="Theme.AppCompat.Light" />
+    <style name="Theme.Design.Light" parent="Theme.AppCompat.Light">
+        <item name="textColorError">?attr/colorError</item>
+    </style>
 
     <style name="Theme.Design.NoActionBar">
         <item name="windowActionBar">false</item>