For #11498 #11499 - preland new synced tabs strings

app/src/main/res/values/strings.xml

@@ -1410,6 +1410,12 @@
     <string name="synced_tabs_reauth">Please re-authenticate.</string>
     <!-- Text displayed when user has disabled tab syncing in Firefox Sync Account -->
     <string name="synced_tabs_enable_tab_syncing">Please enable tab syncing.</string>
+    <!-- Text displayed when user has no tabs that have been synced -->
+    <string name="synced_tabs_no_tabs">You don’t have any tabs open in Firefox on your other devices.</string>
+    <!-- Text displayed in the synced tabs screen when a user is not signed in to Firefox Sync describing Synced Tabs -->
+    <string name="synced_tabs_sign_in_message">View a list of tabs from your other devices.</string>
+    <!-- Text displayed on a button in the synced tabs screen to link users to sign in when a user is not signed in to Firefox Sync -->
+    <string name="synced_tabs_sign_in_button">Sign in to sync</string>
 
     <!-- Top Sites -->
     <!-- Title text displayed in the dialog when top sites limit is reached. -->
@@ -1418,4 +1424,5 @@
     <string name="top_sites_max_limit_content">To add a new top site, remove one. Long press the site and select remove.</string>
     <!-- Confirmation dialog button text when top sites limit is reached. -->
     <string name="top_sites_max_limit_confirmation_button">OK, Got It</string>
+
 </resources>