Notify user regarding invalid number during MO call.

When user dials an invalid number, network returns an error indicating
"unobtainable number" (See the Table 10.5.123/3GPP TS 24.008 for
the possible failure causes). Changes done to display message to
indicate user that an invalid number has been dialed.

Change-Id: I477d64bc3b59cc205396f911ff9630c640f619f3

Author: Naveen Kalla

telephony/java/com/android/internal/telephony/Connection.java

@@ -50,6 +50,7 @@ public enum DisconnectCause {
         CS_RESTRICTED,                  /* call was blocked by restricted all voice access */
         CS_RESTRICTED_NORMAL,           /* call was blocked by restricted normal voice access */
         CS_RESTRICTED_EMERGENCY,        /* call was blocked by restricted emergency voice access */
+        UNOBTAINABLE_NUMBER,            /* Unassigned number (3GPP TS 24.008 table 10.5.123) */
         CDMA_LOCKED_UNTIL_POWER_CYCLE,  /* MS is locked until next power cycle */
         CDMA_DROP,
         CDMA_INTERCEPT,                 /* INTERCEPT order received, MS state idle entered */

telephony/java/com/android/internal/telephony/gsm/CallFailCause.java

@@ -25,6 +25,9 @@
  *
  */
 public interface CallFailCause {
+    // Unassigned/Unobtainable number
+    static final int UNOBTAINABLE_NUMBER = 1;
+
     static final int NORMAL_CLEARING     = 16;
     // Busy Tone
     static final int USER_BUSY           = 17;

telephony/java/com/android/internal/telephony/gsm/GsmConnection.java

@@ -356,6 +356,9 @@ public void cancelPostDial() {
             case CallFailCause.FDN_BLOCKED:
                 return DisconnectCause.FDN_BLOCKED;
 
+            case CallFailCause.UNOBTAINABLE_NUMBER:
+                return DisconnectCause.UNOBTAINABLE_NUMBER;
+
             case CallFailCause.ERROR_UNSPECIFIED:
             case CallFailCause.NORMAL_CLEARING:
             default: