Fix emergency call issue

When emergency network request is received, mms id is being
returned in apncontext instead of emergency id.

Fix is to replace mms id with emergency id for emergency request.

Bug: 29577522
Change-Id: I288ce4bf6f855fc5fe4ce93b6449ae16c4dd6dfb
diff --git a/src/java/com/android/internal/telephony/dataconnection/ApnContext.java b/src/java/com/android/internal/telephony/dataconnection/ApnContext.java
index 1daf463..7630b2c 100644
--- a/src/java/com/android/internal/telephony/dataconnection/ApnContext.java
+++ b/src/java/com/android/internal/telephony/dataconnection/ApnContext.java
@@ -618,7 +618,7 @@
         }
         if (nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_EIMS)) {
             if (apnId != DctConstants.APN_INVALID_ID) error = true;
-            apnId = DctConstants.APN_MMS_ID;
+            apnId = DctConstants.APN_EMERGENCY_ID;
         }
         if (error) {
             // TODO: If this error condition is removed, the framework's handling of