Update "fullscreen" to "full screen" in all strings.

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 719 matching lines @@
       <!-- Storage preferences -->
       <message name="IDS_WEBSITE_SETTINGS_STORAGE" desc="Title for Storage settings which show how much data websites are storing on the user's device. [CHAR-LIMIT=32]">
         Storage
       </message>
       <message name="IDS_ORIGIN_SETTINGS_STORAGE_USAGE_BRIEF" desc="Explanation of how much local storage a website is using">
         <ph name="STORAGE_AMOUNT">%1$s<ex>2 MB</ex></ph> stored data
       </message>
 
       <!-- Fullscreen preferences -->
       <message name="IDS_WEBSITE_SETTINGS_FULLSCREEN" desc="Title for Fullscreen settings, which control which websites can enter fullscreen without popup alert.">
-        Fullscreen
+        Full screen
       </message>
       <message name="IDS_FULLSCREEN_PERMISSION_TITLE" desc="Title for the permission of entering fullscreen without popup alert [CHAR-LIMIT=32]">
-        Fullscreen
+        Full screen
       </message>
 
       <!-- Data Saver -->
       <message name="IDS_DATA_REDUCTION_LO_FI_SNACKBAR_MESSAGE" desc="Message shown when a page is opened in low fidelity mode when there is a slow unreliable connection.">
         Slow connection detected
       </message>
       <message name="IDS_DATA_REDUCTION_LO_FI_SNACKBAR_ACTION" desc="Button to load original full-resolution images when a page is opened in low fidelity mode when there is a slow unreliable connection.">
         Load images
       </message>
       <message name="IDS_DATA_REDUCTION_LO_FI_PREVIEW_SNACKBAR_MESSAGE" desc="Message shown when a page is opened in preview mode when there is a slow unreliable connection.">
@@ skipping 732 matching lines @@
       <!-- Web Notifications API -->
       <message name="IDS_NOTIFICATION_SITE_SETTINGS_BUTTON" desc="Text of a button shown on notifications, that opens the Site Settings of the website that showed the notification. (If it isn't possible to fit within the char limit, the string will be ellipsized if 3 buttons are shown side by side, so try to ensure that the user can guess the meaning from the first 8 characters). [CHAR-LIMIT=9]">
         Settings
       </message>
       <message name="IDS_NOTIFICATION_WORK_PROFILE_BADGE_CONTENT_DESCRIPTION" desc="Content description of the work profile badge in the notification.">
         Work profile
       </message>
 
       <!-- Fullscreen -->
       <message name="IDS_IMMERSIVE_FULLSCREEN_API_NOTIFICATION" desc="Notification message when a site has entered immersive fullscreen and the directions of how to exit.">
-        Drag from top and touch the back button to exit fullscreen.
+        Drag from top and touch the back button to exit full screen.
       </message>
 
       <message name="IDS_FULLSCREEN_API_NOTIFICATION" desc="Notification message when a site has entered non-immsersive fullscreen and the directions of how to exit.">
-        Touch the back button to exit fullscreen.
+        Touch the back button to exit full screen.
       </message>
 
       <!-- Download UI -->
       <message name="IDS_DOWNLOAD_NOTIFICATION_CANCEL_BUTTON" desc="Text on the button that cancels a download.">
         Cancel
       </message>
       <message name="IDS_DOWNLOAD_NOTIFICATION_COMPLETED" desc="Download notification to be displayed when a download completes.">
         Download complete.
       </message>
       <message name="IDS_DOWNLOAD_NOTIFICATION_FAILED" desc="Download notification to be displayed when a download fails.">
@@ skipping 888 matching lines @@
     <!-- Password Manager strings -->
       <message name="IDS_UPDATE_PASSWORD" desc="A message shown to users to allow updating a saved password for a site, shown in an infobar that appears after the user uses a different password to sign in to the site or uses a password change form.">
         Do you want <ph name="PASSWORD_MANAGER_BRAND">^1<ex>Google Chrome</ex></ph> to update your password for this site?
       </message>
       <message name="IDS_UPDATE_PASSWORD_FOR_ACCOUNT" desc="A message shown to users to allow updating a saved password for a site, where user has multiple credentials saved, shown in an infobar that appears after user uses new password to sign in to the site or uses a password change form.">
         Do you want <ph name="PASSWORD_MANAGER_BRAND">^1<ex>Google Chrome</ex></ph> to update the password for <ph name="USERNAME">^2<ex>don.john.lemon@example.com</ex></ph> for this site?
       </message>
     </messages>
   </release>
 </grit>