Make some android code gender neutral.

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 196 matching lines @@
       <!-- Main Preferences -->
       <message name="IDS_PREFERENCES" desc="Title for Chrome's Settings.">
         Settings
       </message>
       <message name="IDS_MENU_HELP" desc="Menu item for opening the help page. [CHAR-LIMIT=27]">
         Help &amp; feedback
       </message>
       <message name="IDS_MANAGED_BY_YOUR_ADMINISTRATOR" desc="Popup message when the user clicks a UI element that has been disabled by enterprise policy.">
         Managed by your administrator
       </message>
-      <message name="IDS_MANAGED_BY_YOUR_PARENTS" desc="Popup message when the user clicks a UI element that has been disabled by his/her parents.">
+      <message name="IDS_MANAGED_BY_YOUR_PARENTS" desc="Popup message when the user clicks a UI element that has been disabled by their parents.">
         Managed by your parents
       </message>
-      <message name="IDS_MANAGED_BY_YOUR_PARENT" desc="Popup message when the user clicks a UI element that has been disabled by his/her parent.">
+      <message name="IDS_MANAGED_BY_YOUR_PARENT" desc="Popup message when the user clicks a UI element that has been disabled by their parent.">
         Managed by your parent
       </message>
       <message name="IDS_PREFS_SECTION_BASICS" desc='Title of "Basics" section of preferences. [CHAR-LIMIT=32]'>
         Basics
       </message>
       <message name="IDS_PREFS_SECTION_ADVANCED" desc='Title of "Advanced" section of preferences. [CHAR-LIMIT=32]'>
         Advanced
       </message>
       <message name="IDS_ENTER_VR" desc="Menu item for entering VR. [CHAR-LIMIT=27]">
         Enter VR
@@ skipping 2471 matching lines @@
       <message name="IDS_ITEM_CHOOSER_ITEM_NAME_WITH_ID" desc="To distinguish items with the same name, the item chooser shows the item name with id.">
         <ph name="ITEM_NAME">%1$s<ex>item_name</ex></ph> (<ph name="ITEM_ID">%2$s<ex>item id</ex></ph>)
       </message>
 
       <message name="IDS_INSTANT_APPS_OPEN_IN_APP" desc="Button label for the user action that will open an Instant App.">
         Open app
       </message>
     </messages>
   </release>
 </grit>