Update account and sync management UX

chrome/android/java/res/xml/sync_customization_preferences.xml

Index: chrome/android/java/res/xml/sync_customization_preferences.xml
diff --git a/chrome/android/java/res/xml/sync_customization_preferences.xml b/chrome/android/java/res/xml/sync_customization_preferences.xml
index 6d9b3864bd2262bba419a970baaa3fdd6879ad4b..7509fe19b245783aae552e39b9dc495ef4238896 100644
--- a/chrome/android/java/res/xml/sync_customization_preferences.xml
+++ b/chrome/android/java/res/xml/sync_customization_preferences.xml
@@ -7,8 +7,13 @@
 
     <org.chromium.chrome.browser.preferences.ChromeSwitchPreference
         android:key="sync_switch"
-        android:summaryOn="@string/text_on"
-        android:summaryOff="@string/text_off" />
+        android:title="@string/sign_in_sync"
+        android:summary="@string/sync_description" />
+
+    <org.chromium.chrome.browser.preferences.SyncAccountListPreference
+        android:key="sync_account_list"
+        android:title="@string/sync_to_account_header"

[newt (away), 2016/02/12 22:03:50]

I'd suggest setting the title and summary in Java, so that all the logic related
to this preference lives in SyncAccountListPreference.java, rather than having a
small bit of the logic live in the xml file.

[May, 2016/02/16 17:32:06]

Done.

+        android:summary="%s" />
 
     <PreferenceCategory
         android:key="sync_data_types"