Disable on-screen keyboard for emergency dialer

Change-Id: I70ef3cc6724dfe2c0a88c7d47ede3d119d04e0d3
Fix: 28892622
diff --git a/src/com/android/phone/EmergencyDialer.java b/src/com/android/phone/EmergencyDialer.java
index 13cb339..227e112 100644
--- a/src/com/android/phone/EmergencyDialer.java
+++ b/src/com/android/phone/EmergencyDialer.java
@@ -36,6 +36,7 @@
 import android.telephony.PhoneNumberUtils;
 import android.telephony.SubscriptionManager;
 import android.text.Editable;
+import android.text.InputType;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.TextUtils;
@@ -184,6 +185,7 @@
         mDigits.setOnClickListener(this);
         mDigits.setOnKeyListener(this);
         mDigits.setLongClickable(false);
+        mDigits.setInputType(InputType.TYPE_NULL);
         maybeAddNumberFormatting();
 
         // Check for the presence of the keypad