Add log message in ImsManager

There is about 3 or 4 reaons we can reach this place in the code.
Adding log message to make it easier for clients to find the issue.

Test: None, just adding log message
Change-Id: I0e430bfa0f63af25ed30fcb82899e32fd12e11d4
diff --git a/src/java/com/android/ims/ImsManager.java b/src/java/com/android/ims/ImsManager.java
index 7891378..24d9247 100644
--- a/src/java/com/android/ims/ImsManager.java
+++ b/src/java/com/android/ims/ImsManager.java
@@ -237,6 +237,7 @@
                                 }
                             }
                         } catch (ImsException e) {
+                            loge("notifyStateChanged(): ", e);
                             // Could not get the ImsService, retry!
                             notifyNotReady();
                             retryGetImsService();