Update UI strings based on the latest user research.

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index eab27a4124af2d3d0a5b08692827d053c6ab44ba..c8e0b9d90ccd7167081c023d50d25d10fe5a5bac 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -1582,17 +1582,24 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_TRANSLATE_NEVER_TRANSLATE_LANGUAGE" desc="Text that appears on a button. Chrome asks the user if they want to translate a page from the source language into another, target language that the user may have shown interest in before. User can click the 'Never Translate' button to indicate that they never want Chrome to translate pages in this language. Imperative. [CHAR-LIMIT=64]">
         Never translate <ph name="LANGUAGE">%1$s<ex>French</ex></ph>
       </message>
-      <message name="IDS_TRANSLATE_INFOBAR_MORE_LANGUAGE" desc="Option in the Chrome menu. Lets the user open a dialog to choose other target languages for translation, from a list of available languages. [CHAR-LIMIT=64]">
+
+      <message name="IDS_TRANSLATE_OPTION_ALWAYS_TRANSLATE" desc="Option in the Chrome menu. User can click the 'Always Translate' option to indicate that they want Chrome to translate pages in this language automatically. Imperative.">
+        Always translate pages in <ph name="SOURCE_LANGUAGE">%1$s<ex>French</ex></ph>
+      </message>
+      <message name="IDS_TRANSLATE_OPTION_NEVER_TRANSLATE" desc="Option in the Chrome menu. User can click the 'Never Translate' option to indicate that they never want Chrome to translate pages in this language. Imperative.">
+        Never translate pages in <ph name="SOURCE_LANGUAGE">%1$s<ex>French</ex></ph>

[srahim, 2017/05/15 05:20:09]

Please add to message description, before "Imperative.":
The variable SOURCE_LANGUAGE could be any of 50+ languages supported by Google
Translate, like French, Spanish, German, Italian, Japanese, Korean, etc.

[Leo, 2017/05/15 05:45:06]

Done.

+      </message>
+      <message name="IDS_TRANSLATE_OPTION_MORE_LANGUAGE" desc="Option in the Chrome menu. Lets the user open a dialog to choose other target languages for translation, from a list of available languages. [CHAR-LIMIT=64]">
         More languages
       </message>
-      <message name="IDS_TRANSLATE_INFOBAR_NOT_SOURCE_LANGUAGE" desc="Option in the Chrome menu. Lets the user select another language as source language to translate. [CHAR-LIMIT=64]">
-        Page is not in <ph name="LANGUAGE">%1$s<ex>French</ex></ph>
+      <message name="IDS_TRANSLATE_OPTION_NOT_SOURCE_LANGUAGE" desc="Option in the Chrome menu. Lets the user select another language as source language to translate. [CHAR-LIMIT=64]">
+        Page is not in <ph name="LANGUAGE">%1$s<ex>French</ex></ph>?

[srahim, 2017/05/15 05:20:09]

Please update message description:
Option in the Chrome menu. Sometimes a web page's source language is not
correctly identified by Google Translate, and this menu option lets the user 1)
indicate this error to Google, and 2) open a submenu to select another language
as the source language to translate. Phrased as a question as if to query the
user, "Is this page not in <source language identified>? If so, click here."  

[Leo, 2017/05/15 05:45:06]

Done.

       </message>
       <message name="IDS_TRANSLATE_SNACKBAR_ALWAYS_TRANSLATE" desc="Text to be displayed in translate snackbar that lets the user know pages in this source language will be translated to target language automatically. [CHAR-LIMIT=64]">

[srahim, 2017/05/15 05:20:09]

Please update message description:
After the user selects "Always translate pages in <LANGUAGE>", this text
confirms the user's choice and lets them know that pages in <LANGUAGE> will be
translated to their chosen target language automatically. Imperative.

[Leo, 2017/05/15 05:45:06]

Done.

-        Sites in <ph name="SOURCE_LANGUAGE">%1$s<ex>French</ex></ph> will be translated to <ph name="TARGET_LANGUAGE">%2$s<ex>English</ex></ph>
+        Pages in <ph name="SOURCE_LANGUAGE">%1$s<ex>French</ex></ph> will be translated to <ph name="TARGET_LANGUAGE">%2$s<ex>English</ex></ph> from now on
       </message>
       <message name="IDS_TRANSLATE_SNACKBAR_LANGUAGE_NEVER" desc="Text to be displayed in translate snackbar that lets the user know sites in this language will not be translated. [CHAR-LIMIT=64]">

[srahim, 2017/05/15 05:20:09]

Please update message description:
After the user selects "Never translate pages in <LANGUAGE>", this text confirms
the user's choice and lets them know that pages in <LANGUAGE> will not be
translated to their chosen target language automatically. Imperative.

-        Sites in <ph name="LANGUAGE">%1$s<ex>French</ex></ph> will not be translated
+        Pages in <ph name="LANGUAGE">%1$s<ex>French</ex></ph> will not be translated
       </message>
       <message name="IDS_TRANSLATE_SNACKBAR_SITE_NEVER" desc="Text to be displayed in translate snackbar that lets the user know this site will not be translated. [CHAR-LIMIT=64]">
         This site will not be translated