[Managed Session] Adjust warning strings displayed during login

New strings are available @
https://docs.google.com/document/d/1cVwZrMVUwOWUCdHFJ2bRe0nVzam4xFNSozmObaKs2Tg

Bug: 865947
Change-Id: I163605c3c82230a3a8b0dd9d96fd9eda038fe29b
Reviewed-on: https://chromium-review.googlesource.com/1172686Reviewed-by: Kush Sinha <sinhak@chromium.org>
Commit-Queue: Ivan Šandrk <isandrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582872}

ash/ash_strings.grd

@@ -1484,13 +1484,13 @@ This file contains the strings for ash.
         Managed by <ph name="DOMAIN">$1<ex>yourdomain.com</ex></ph>
       </message>
       <message name="IDS_ASH_LOGIN_PUBLIC_ACCOUNT_MONITORING_WARNING" desc="Template for text shown in the public account user pod, informing the user that this is a public, managed account.">
-        The device manager may be able to monitor your activity.
+        The administrator of this device has access to all activity, including passwords and communications.
       </message>
       <message name="IDS_ASH_LOGIN_PUBLIC_ACCOUNT_SIGNOUT_REMINDER" desc="Text shown in the public account user pod, reminding the user to log out.">
-        Your session will be cleared when you sign out. <ph name="LEARN_MORE">$1<ex>Learn more</ex></ph>
+        Your internet session will be cleared when you sign out. <ph name="LEARN_MORE">$1<ex>Learn more</ex></ph>
       </message>
       <message name="IDS_ASH_LOGIN_PUBLIC_SESSION_LANGUAGE_AND_INPUT" desc="Link in public session pod that shows a section which allows the user to change the UI language and keyboard layout.">
-        Choose language and input
+        Choose language and keyboard
       </message>
       <message name="IDS_ASH_LOGIN_LANGUAGE_SELECTION_SELECT" desc="Label for language selection dropdown">
         Set your language