Match rename-menu string names to how they are used

The confirm action read its visible label from a string named
..._content_description, which lied about the resource's role. Split
into ..._confirm_title ("Save") for android:title and keep
..._confirm_content_description ("Save chat title") for the new
android:contentDescription binding, so each string is wired to the
attribute its name implies.

Author: GerardPaligot

duckchat/duckchat-impl/src/main/res/menu/menu_rename_chat.xml

@@ -18,8 +18,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/action_rename_confirm"
+        android:contentDescription="@string/duck_ai_chat_history_rename_confirm_content_description"
         android:enabled="false"
         android:icon="@drawable/ic_check_24"
-        android:title="@string/duck_ai_chat_history_rename_confirm_content_description"
+        android:title="@string/duck_ai_chat_history_rename_confirm_title"
         app:showAsAction="always" />
 </menu>

duckchat/duckchat-impl/src/main/res/values/donottranslate.xml

@@ -104,6 +104,7 @@
     <string name="duck_ai_chat_history_exit_select_mode_content_description">Exit selection mode</string>
     <string name="duck_ai_chat_history_rename_title">Rename Chat</string>
     <string name="duck_ai_chat_history_rename_chat_title_hint">Chat Title</string>
-    <string name="duck_ai_chat_history_rename_confirm_content_description">Save</string>
+    <string name="duck_ai_chat_history_rename_confirm_title">Save</string>
+    <string name="duck_ai_chat_history_rename_confirm_content_description">Save chat title</string>
     <string name="duck_ai_chat_history_rename_error">Couldn\'t rename chat</string>
 </resources>