CallPresenter: enable dial pad for incoming call

Change-Id: Ib6097b324bf0a603c198601da38bb63372e73696
diff --git a/ring-android/libringclient/src/main/java/cx/ring/call/CallPresenter.java b/ring-android/libringclient/src/main/java/cx/ring/call/CallPresenter.java
index 1e25228..76328fd 100644
--- a/ring-android/libringclient/src/main/java/cx/ring/call/CallPresenter.java
+++ b/ring-android/libringclient/src/main/java/cx/ring/call/CallPresenter.java
@@ -239,7 +239,7 @@
     public void prepareOptionMenu() {
         boolean isSpeakerOn = mHardwareService.isSpeakerPhoneOn();
         //boolean hasContact = mSipCall != null && null != mSipCall.getContact() && mSipCall.getContact().isUnknown();
-        boolean canDial = mOnGoingCall && mConference != null && !mConference.isIncoming();
+        boolean canDial = mOnGoingCall && mConference != null;
         // get the preferences
         boolean displayPluginsButton = getView().displayPluginsButton();
         boolean showPluginBtn = displayPluginsButton && mOnGoingCall && mConference != null;