Restricting Accessibility flows for Private Profile.

Adding PS apps to the home screen is restricted.
This CL prevents the same from accessibility drags.

Bug: 289223923
Flag: ACONFIG com.android.launcher3.Flags.private_space_restrict_accessibility_drag DEVELOPEMENT
Test: Ran Launcher3 Tests.
Change-Id: I3e2b7b196b96a4d2ba34d8ece5fd6e0463f17253
diff --git a/aconfig/launcher_search.aconfig b/aconfig/launcher_search.aconfig
index 97e56b7..b846604 100644
--- a/aconfig/launcher_search.aconfig
+++ b/aconfig/launcher_search.aconfig
@@ -26,4 +26,11 @@
     namespace: "launcher_search"
     description: "This flag enables addition of App Installer button in Private Space container."
     bug: "308064949"
-}
\ No newline at end of file
+}
+
+flag {
+    name: "private_space_restrict_accessibility_drag"
+    namespace: "launcher_search"
+    description: "This flag disables accessibility drag for Private Space Apps."
+    bug: "289223923"
+}