Use string from strings.xml

OpenPGP-Keychain/src/main/res/values/strings.xml

@@ -130,6 +130,7 @@
     <string name="label_send_key">Upload key to selected keyserver after certification</string>
     <string name="label_fingerprint">Fingerprint</string>
     <string name="select_keys_button_default">Select</string>
+    <string name="expiry_date_dialog_title">Set expiry date</string>
 
     <plurals name="select_keys_button">
         <item quantity="one">%d selected</item>