fix import, add missing multi select menu

OpenPGP-Keychain/res/menu/key_list_secret_multi.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <item
+        android:id="@+id/menu_key_list_public_multi_delete"
+        android:icon="@android:drawable/ic_menu_delete"
+        android:title="@string/menu_delete_key"/>
+
+</menu>