Add logs for debugging IME onConfigurationChanged

To help clarify why IME service client didn't receive
onConfigurationChanged callback.

Bug: 135719017
Test: manual
Change-Id: I2c17e2290f6cefd49ed5c30a8a524dcb48d6ee40
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 7e741a0..aeb1ebe 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -6506,6 +6506,7 @@
                     }
                     return;
                 }
+                process.mIsImeProcess = true;
                 process.registerDisplayConfigurationListenerLocked(activityDisplay);
             }
         }