Add ripple effect on all preference tiles.

Bug: 30201359
Change-Id: If02b7b08c05c23a4db3a0455ce12df31c4b7bf42
diff --git a/res/values/themes.xml b/res/values/themes.xml
index e09a02d..d1c4890 100644
--- a/res/values/themes.xml
+++ b/res/values/themes.xml
@@ -93,7 +93,7 @@
         <item name="android:windowAnimationStyle">@null</item>
     </style>
 
-    <style name="PreferenceTheme" parent="Theme.SettingsBase">
+    <style name="PreferenceTheme" parent="@style/PreferenceThemeOverlay.v14.Material">
         <item name="@android:preferenceStyle">@style/Preference</item>
         <item name="@android:editTextPreferenceStyle">@style/EditTextPreference</item>
         <item name="@dropdownPreferenceStyle">@style/Preference.DropDown.Material</item>