#1661 - Don't expose CertifyActivity

*Add new activity - RedirectImportKeysActivity, which prompts user to
use Openkeychain directly
*Add intent filter for the activity
*Change intent filter for CertifyActivity

OpenKeychain/src/main/res/values/dimens.xml

@@ -5,4 +5,7 @@
     <dimen name="big_toolbar">120dp</dimen>
     <dimen name="huge_toolbar">222dp</dimen>
     <dimen name="minus_statusbar_height">0dp</dimen>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
 </resources>

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

@@ -1740,4 +1740,6 @@
         <item>50 EUR</item>
         <item>100 EUR</item>
     </string-array>
+    <string name="title_activity_redirect_key">RedirectKeyActivity</string>
+    <string name="action_settings">Settings</string>
 </resources>