Add flag to disable hiding complications on touch

The existing logic to hide dream overlay complications on touch is
conflicting with transitions to/from the hub.

Bug: 329091030
Test: "adb shell device_config override systemui
com.android.systemui.remove_dream_overlay_hide_on_touch true" and
verified overlays are no longer hidden on touch
Flag: ACONFIG com.android.systemui.remove_dream_overlay_hide_on_touch DISABLED

Change-Id: I1fca6cc533769e6fb32c54297888f48a2aecf210
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index fd2fa07..0dd7b25 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -746,6 +746,16 @@
 }
 
 flag {
+  name: "remove_dream_overlay_hide_on_touch"
+  namespace: "systemui"
+  description: "Removes logic to hide the dream overlay on user interaction, as it conflicts with various transitions"
+  bug: "329091030"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+}
+
+flag {
     name: "keyboard_docking_indicator"
     namespace: "systemui"
     description: "Glow bar indicator reveals upon keyboard docking."