Fix crash in setAdditionalInputMethodSubtypes

Bug: 5142455
Change-Id: I5eca4c1a3d9a964db04c819fc671670ef1b81817
diff --git a/services/java/com/android/server/InputMethodManagerService.java b/services/java/com/android/server/InputMethodManagerService.java
index ba2438b..bb831f5 100644
--- a/services/java/com/android/server/InputMethodManagerService.java
+++ b/services/java/com/android/server/InputMethodManagerService.java
@@ -1682,7 +1682,12 @@
                 for (int i = 0; i < packageNum; ++i) {
                     if (packageInfos[i].equals(imi.getPackageName())) {
                         mFileManager.addInputMethodSubtypes(imi, subtypes);
-                        buildInputMethodListLocked(mMethodList, mMethodMap);
+                        final long ident = Binder.clearCallingIdentity();
+                        try {
+                            buildInputMethodListLocked(mMethodList, mMethodMap);
+                        } finally {
+                            Binder.restoreCallingIdentity(ident);
+                        }
                         return true;
                     }
                 }
@@ -1707,7 +1712,7 @@
                 return;
             }
 
-            long ident = Binder.clearCallingIdentity();
+            final long ident = Binder.clearCallingIdentity();
             try {
                 setInputMethodLocked(id, subtypeId);
             } finally {