Make private profile header scrollable

bug: 345007467
Test: manually video:
before: https://drive.google.com/file/d/1XzpD-R48WRKFBeDlHXU5xSGgc50ZON8o/view?usp=sharing
after: https://drive.google.com/file/d/1VBKZluzxvpP8ucs_uylk5esRlm9KzrZb/view?usp=sharing
Flag: Aconfig com.android.launcher3.enable_private_space Nextfood
Change-Id: I1db4bdf244b37b4c4cf55cb0d70d4011fee7de90
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index a810331..5d03a93 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -337,6 +337,8 @@
                 && !mPrivateApps.isEmpty()) {
             // Always add PS Header if Space is present and visible.
             position = mPrivateProviderManager.addPrivateSpaceHeader(mAdapterItems);
+            mFastScrollerSections.add(new FastScrollSectionInfo(
+                    mPrivateProfileAppScrollerBadge, position));
             int privateSpaceState = mPrivateProviderManager.getCurrentState();
             switch (privateSpaceState) {
                 case PrivateProfileManager.STATE_DISABLED: