[Unity][Android] Fix 'Sync and Google services' Settings strings

This CL changes strings used in sync_and_services_preferences, changing
wording to make the string grammatically correct. It also fixes a typo.

Bug: 864791, 864789
Change-Id: I38ee3efb2894562606f6997113aa2d9a81787ef5
Reviewed-on: https://chromium-review.googlesource.com/1142149Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576311}

chrome/android/java/strings/android_chrome_strings.grd

@@ -332,7 +332,7 @@ CHAR-LIMIT guidelines:
         Autocomplete searches and URLs
       </message>
       <message name="IDS_AUTOCOMPLETE_SEARCHES_AND_URLS_SUMMARY" desc="Summary for a checkbox in Settings that controls URL and search autocompletion and informs the user about the data shared by this feature.">
-        Sends searches from the address bar and search box, and some cookies to your default search engine
+        Sends some cookies and searches from the address bar and search box to your default search engine
       </message>
       <message name="IDS_PRELOAD_PAGES_TITLE" desc="Title for a checkbox in Settings that controls pages preloading and informs the user about the data shared by this feature.">
         Preload pages for faster browsing and searching
@@ -341,7 +341,7 @@ CHAR-LIMIT guidelines:
         Uses cookies to remember your preferences, even if you don't visit those pages
       </message>
       <message name="IDS_NAVIGATION_ERROR_SUGGESTIONS_TITLE" desc="Title for a checkbox in Settings that controls pages suggestions on navigation errors and informs the user about the data shared by this feature.">
-        Shows suggestions for similar pages when a page can't be found
+        Show suggestions for similar pages when a page can't be found
       </message>
       <message name="IDS_NAVIGATION_ERROR_SUGGESTIONS_SUMMARY" desc="Summary for a checkbox in Settings that controls pages suggestions on navigation errors and informs the user about the data shared by this feature.">
         Sends the URL of a page you're trying to reach to Google