created string resource for close (#19500)

Co-authored-by: priyanka0906 <priyanka02amb@reddiffmail.com>

app/src/main/res/layout/activity_privacy_content_display.xml

@@ -22,7 +22,7 @@
                     android:background="@android:color/transparent"
                     android:id="@+id/privacyContentCloseButton"
                     android:src="@drawable/ic_close"
-                    android:contentDescription="close"
+                    android:contentDescription="@string/privacy_content_close_button_content_description"
                     tools:ignore="AndroidSrcXmlDetector" />
 
         </LinearLayout>

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

@@ -1720,4 +1720,8 @@
 
     <!-- Content description for the action bar "up" button -->
     <string name="action_bar_up_description">Navigate up</string>
+
+    <!-- Content description for privacy content close button -->
+    <string name="privacy_content_close_button_content_description">Close</string>
+
 </resources>