Adding <keygen> Content Setting (Android UI)

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 478 matching lines @@
       </message>
       <message name="IDS_ALLOW_THIRD_PARTY_COOKIES_TITLE" desc="Title for Allow Third Party Cookies preference">
         Allow third-party cookies
       </message>
       <message name="IDS_ALLOW_THIRD_PARTY_COOKIES_SUMMARY" desc="Summary text for Allow Third Party Cookies preference">
         Third-party websites can save and read cookie data
       </message>
       <message name="IDS_JAVASCRIPT_PERMISSION_TITLE" desc="Title of the permission to run javascript [CHAR-LIMIT=32]">
         JavaScript
       </message>
+      <message name="IDS_KEYGEN_PERMISSION_TITLE" desc="Title of the permission to run key generation in a form [CHAR-LIMIT=32]">

[Finnur, 2015/11/11 10:25:45]

I don't think this is enough context for a translator to figure out how to
translate this into other languages.

[svaldez, 2015/11/19 17:50:25]

Acknowledged.

+        Key Generation

[Finnur, 2015/11/11 10:25:45]

I'd run this wording by Rebecca as well as the image. I suspect users will find
it a bit cryptic.

[svaldez, 2015/11/19 17:50:25]

I think the plan is to ping UI folks to check over the strings/images for both
this CL and the non-Android UI CL.

+      </message>
       <message name="IDS_POPUP_PERMISSION_TITLE" desc="Title of the permission to display pop-up windows [CHAR-LIMIT=32]">
         Pop-ups
       </message>
       <message name="IDS_PUSH_NOTIFICATIONS_PERMISSION_TITLE" desc="Title for the permission for showing push notifications [CHAR-LIMIT=32]">
         Notifications
       </message>
       <message name="IDS_MIDI_SYSEX_PERMISSION_TITLE" desc="Title of the permission that allows a website to get full control of MIDI devices [CHAR-LIMIT=32]">
         Allow full control of MIDI devices
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE" desc="The label for the button to add a new website to the exception list.">
@@ skipping 1783 matching lines @@
         Nearby URLs
       </message>
       <message name="IDS_PHYSICAL_WEB_NOTIFICATION_TITLE" desc="Description of quantity of discovered URLs nearby.">
         {NUM_URLS, plural,
          =1 {1 URL nearby}
          other {# URLs nearby}}
       </message>
     </messages>
   </release>
 </grit>