Fix inconsistent and incorrect Roboto Medium usage

chrome/android/java/res/values-v17/styles.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2014 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. -->
 
 <resources xmlns:tools="http://schemas.android.com/tools">
     <!-- Q: Why put style resources under values-v17/ ?
          A: Problem:
             1. paddingStart causes a crash on Galaxy Tab&Note b/8351339.
             2. So we wrote a build script(generate_v14_compatible_resources.py) to convert
@@ skipping 112 matching lines @@
         <item name="android:layout">@layout/preference_category</item>
         <item name="android:shouldDisableView">false</item>
         <item name="android:selectable">false</item>
     </style>
     <style name="PreferenceCategoryWithButtonStyle">
         <item name="android:paddingStart">8dp</item>
         <item name="android:paddingEnd">4dp</item>
         <item name="android:paddingTop">16dp</item>
         <item name="android:layout_marginBottom">16dp</item>
     </style>
-    <style name="PreferenceCategoryTextStyle">
+    <style name="PreferenceCategoryTextStyle" parent="RobotoMediumStyle">
         <item name="android:textColor">@color/pref_accent_color</item>
         <item name="android:textSize">12sp</item>
-        <item name="android:textStyle">bold</item>
     </style>
     <style name="PreferenceTitle">
         <item name="android:ellipsize">end</item>
         <item name="android:singleLine">true</item>
         <item name="android:textAppearance">?android:attr/textAppearanceMedium</item>
     </style>
     <style name="PreferenceSummary">
         <item name="android:textAppearance">?android:attr/textAppearanceSmall</item>
         <item name="android:textColor">?android:attr/textColorSecondary</item>
     </style>
@@ skipping 566 matching lines @@
         <item name="android:textColor">@color/data_reduction_breakdown_text_color</item>
         <item name="android:textSize">12sp</item>
     </style>
 
     <!-- Incognito New Tab Page -->
     <style name="IncognitoNewTabMessage">
         <item name="android:maxWidth">660dp</item>
         <item name="android:textSize">14sp</item>
         <item name="android:lineSpacingMultiplier">1.2</item>
     </style>
-    <style name="IncognitoNewTabLearnMoreLink">
+    <style name="IncognitoNewTabLearnMoreLink" parent="RobotoMediumStyle">
         <item name="android:background">?attr/listChoiceBackgroundIndicator</item>
         <item name="android:clickable">true</item>
         <item name="android:focusable">true</item>
         <item name="android:textSize">14sp</item>
         <item name="android:textAllCaps">true</item>
         <item name="android:padding">16dp</item>
     </style>
 
     <!-- Photo Picker animations -->
 
     <style name="PhotoPickerDialogAnimation">
         <item name="android:windowEnterAnimation">@anim/design_bottom_sheet_slide_in</item>
         <item name="android:windowExitAnimation">@null</item>
     </style>
 
     <!-- VR animations -->
     <style name="VrEntryAnimation">
         <item name="android:windowEnterAnimation">@anim/stay_hidden</item>
         <item name="android:windowExitAnimation">@null</item>
     </style>
 </resources>