[Launcher3] Supports child Settings navigation on Search

After adding all launcher settings to search, adding support for navigating to child settings if the setting isn't on the current screen.

result: go/launcher-settings-navigate-to-child

Bug: 293390881
Flag: com.android.launcher3.navigate_to_child_preference
Test: Manual

Change-Id: I5eecbf9a3c569f58b6c8830443d86ba122e4f53b
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index b3253d1..a779641 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -322,4 +322,10 @@
     namespace: "launcher"
     description: "Menu in Taskbar with options to launch and manage multiple instances of the same app"
     bug: "355237285"
-}
\ No newline at end of file
+}
+flag {
+    name: "navigate_to_child_preference"
+    namespace: "launcher"
+    description: "Settings screen supports navigating to child preference if the key is not on the screen"
+    bug: "293390881"
+}