[VOL-2363] Fixed Cleanup of AAA Sessions on Device Remove event.

This patch fixes the master branch (v2.0.1 of AAA app). The aaa-1.10
branch for v1.10.0 of AAA app has been fixed in patchset
https://gerrit.opencord.org/#/c/17342/

Change-Id: I1e941fa14586ff0489fa702ba79f7835ca71eea3
diff --git a/app/src/main/java/org/opencord/aaa/impl/StateMachine.java b/app/src/main/java/org/opencord/aaa/impl/StateMachine.java
index 898433b..7299818 100644
--- a/app/src/main/java/org/opencord/aaa/impl/StateMachine.java
+++ b/app/src/main/java/org/opencord/aaa/impl/StateMachine.java
@@ -88,7 +88,8 @@
     public enum SessionTerminationReasons {
         SUPPLICANT_LOGOFF("SUPPLICANT_LOGOFF"),
         TIME_OUT("TIME_OUT"),
-        PORT_REMOVED("PORT_REMOVED");
+        PORT_REMOVED("PORT_REMOVED"),
+        DEVICE_REMOVED("DEVICE_REMOVED");
 
         private final String reason;