Extract string resource

res/layout/registration_activity.xml

@@ -314,7 +314,7 @@
 
             <com.dd.CircularProgressButton
                     android:id="@+id/pinButton"
-                    app:cpb_textIdle="Continue"
+                    app:cpb_textIdle="@string/RegistrationActivity_continue"
                     app:cpb_selectorIdle="@drawable/progress_button_state"
                     app:cpb_colorIndicator="@color/white"
                     app:cpb_colorProgress="@color/textsecure_primary"

res/values/strings.xml

@@ -1396,6 +1396,7 @@
     <string name="RegistrationLockDialog_error_connecting_to_the_service">Error connecting to the service</string>
     <string name="RegistrationLockDialog_disable_registration_lock_pin">Disable Registration Lock PIN?</string>
     <string name="RegistrationLockDialog_disable">Disable</string>
+    <string name="RegistrationActivity_continue">Continue</string>
     <!-- EOF -->
 
 </resources>