Fix for missing call drop notice in CDMA mode

In case the cdma modem indicates unspecified error as a reason for a
dropped call, then the cause was wrongly being translated to NORMAL call in
DisconnectCause. This has been fixed to report ERROR_UNSPECIFIED as
DisconnectCause in Connection.java.

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

@@ -56,7 +56,8 @@ public abstract class Connection {
         CDMA_RETRY_ORDER,               /* requeseted service is rejected, retry delay is set */
         CDMA_ACCESS_FAILURE,
         CDMA_PREEMPTED,
-        CDMA_NOT_EMERGENCY              /* not an emergency call */
+        CDMA_NOT_EMERGENCY,              /* not an emergency call */
+        ERROR_UNSPECIFIED
     }
 
     Object userData;

telephony/java/com/android/internal/telephony/cdma/CdmaConnection.java

@@ -435,8 +435,10 @@ public class CdmaConnection extends Connection {
                 } else if (phone.mCM.getRadioState() != CommandsInterface.RadioState.NV_READY
                         && phone.getIccCard().getState() != RuimCard.State.READY) {
                     return DisconnectCause.ICC_ERROR;
-                } else {
+                } else if (causeCode==CallFailCause.NORMAL_CLEARING) {
                     return DisconnectCause.NORMAL;
+                } else {
+                    return DisconnectCause.ERROR_UNSPECIFIED;
                 }
         }
     }

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

@@ -381,10 +381,14 @@ public class GsmConnection extends Connection {
                     } else if (phone.mSST.rs.isCsNormalRestricted()) {
                         return DisconnectCause.CS_RESTRICTED_NORMAL;
                     } else {
-                        return DisconnectCause.NORMAL;
+                        return DisconnectCause.ERROR_UNSPECIFIED;
                     }
-                } else {
+                } else if (causeCode == CallFailCause.NORMAL_CLEARING) {
                     return DisconnectCause.NORMAL;
+                } else {
+                    // If nothing else matches, report unknown call drop reason
+                    // to app, not NORMAL call end.
+                    return DisconnectCause.ERROR_UNSPECIFIED;
                 }
         }
     }