Call displayCompletions couple frames after selectAll is called
Bug: 158710542

Change-Id: I295adce9d84bb82c4af27b7e54693ce4c64004cc
diff --git a/src/com/android/launcher3/folder/FolderNameEditText.java b/src/com/android/launcher3/folder/FolderNameEditText.java
index edf2c70..6038a05 100644
--- a/src/com/android/launcher3/folder/FolderNameEditText.java
+++ b/src/com/android/launcher3/folder/FolderNameEditText.java
@@ -70,8 +70,11 @@
         for (int i = 0; i < cnt; i++) {
             cInfo[i] = new CompletionInfo(i, i, suggestList.get(i));
         }
-        post(() -> getContext().getSystemService(InputMethodManager.class)
-                .displayCompletions(this, cInfo));
+        // post it to future frame so that onSelectionChanged, onFocusChanged, all other
+        // TextView flag change and IME animation has settled. Ideally, there should be IMM
+        // callback to notify when the IME animation and state handling is finished.
+        postDelayed(() -> getContext().getSystemService(InputMethodManager.class)
+                .displayCompletions(this, cInfo), 40 /* 2~3 frame delay */);
     }
 
     /**