Set the EditTextInput field underline color to accent

Change-Id: I9a05590cecda1a94c69dcad2d8ede2187d1d5f76
Fixes: 80148000
Test: In head unit
diff --git a/car-settings-lib/res/values/themes.xml b/car-settings-lib/res/values/themes.xml
index 63c98d3..5a34080 100644
--- a/car-settings-lib/res/values/themes.xml
+++ b/car-settings-lib/res/values/themes.xml
@@ -20,6 +20,8 @@
         <item name="android:windowBackground">@color/windowBackground</item>
         <item name="android:colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="android:windowLightStatusBar">true</item>
+        <item name="android:colorControlNormal">?android:attr/colorAccent</item>
+        <item name="android:colorControlActivated">?android:attr/colorAccent</item>
         <item name="android:colorControlHighlight">?android:attr/colorAccent</item>
         <item name="android:colorAccent">@color/blue_600</item>
         <item name="android:colorButtonNormal">@color/blue_600</item>