Update EditText textColorHint for disabled state

Currently, we use default_text_color_secondary for EditText's
textColorHint. This CL replaces the textColorHint color with a state
list that has default_text_color_disabled for the disabled state.

Bug: 1162023
Change-Id: If854640c8eb4e7319a45c65548c1059c4e66f673
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2618964
Commit-Queue: Theresa  <twellington@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841832}

components/browser_ui/styles/android/java/res/values/styles.xml

@@ -9,7 +9,7 @@
         <!-- Text colors -->
         <item name="android:textColorLink">@color/default_text_color_link</item>
         <item name="android:textColorHighlight">@color/text_highlight_color</item>
-        <item name="android:textColorHint">@color/default_text_color_secondary</item>
+        <item name="android:textColorHint">@color/default_text_color_hint_list</item>
 
         <!-- Color of checkboxes, switches, buttons, etc. -->
         <item name="colorAccent">@color/default_control_color_active</item>

ui/android/BUILD.gn

@@ -147,6 +147,7 @@ android_resources("ui_java_resources") {
     "java/res/color/chip_stroke_color.xml",
     "java/res/color/chip_text_color.xml",
     "java/res/color/chip_text_color_secondary.xml",
+    "java/res/color/default_text_color_hint_list.xml",
     "java/res/color/default_text_color_inverse_list.xml",
     "java/res/color/default_text_color_light_list.xml",
     "java/res/color/default_text_color_list.xml",

ui/android/java/res/color/default_text_color_hint_list.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2021 The Chromium Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style license that can be
+     found in the LICENSE file.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/default_text_color_disabled" android:state_enabled="false"/>
+    <item android:color="@color/default_text_color_secondary" />
+</selector>
\ No newline at end of file