Fixes NPE when trying to log sessionID value.

PiperOrigin-RevId: 276521135
Change-Id: I02673d26ea57e4cbfb40fa58f6a955adc49e1685
diff --git a/src/main/java/com/google/android/libraries/feed/feedsessionmanager/FeedSessionManagerImpl.java b/src/main/java/com/google/android/libraries/feed/feedsessionmanager/FeedSessionManagerImpl.java
index 845a3c8..102ea77 100644
--- a/src/main/java/com/google/android/libraries/feed/feedsessionmanager/FeedSessionManagerImpl.java
+++ b/src/main/java/com/google/android/libraries/feed/feedsessionmanager/FeedSessionManagerImpl.java
@@ -472,10 +472,7 @@
             sessionCache.putAttachedAndRetainMetadata(sessionId, session);
             existingSessionCount++;
           } else {
-            Logger.e(
-                TAG,
-                "unable to get stream structure for existing session %s",
-                session.getSessionId());
+            Logger.e(TAG, "unable to get stream structure for existing session %s", sessionId);
             switchToEphemeralMode("unable to get stream structure for existing session");
           }
         });