Fix testWidgetsContainerFling

It relies on the presence of the popup in the accessibility view.

Bug: 72967764
Test: atest google/perf/jank/SystemUI/UbSystemUIJankTests:android.platform.systemui.tests.jank.LauncherJankTests#testWidgetsContainerFling
Change-Id: I9d41ddcd60f9dc7626a96762b4e78a7b862aa1c9
diff --git a/res/layout/longpress_options_menu.xml b/res/layout/longpress_options_menu.xml
index 168dbc3..20bb5b8 100644
--- a/res/layout/longpress_options_menu.xml
+++ b/res/layout/longpress_options_menu.xml
@@ -22,4 +22,5 @@
     android:clipToPadding="false"
     android:clipChildren="false"
     android:elevation="@dimen/deep_shortcuts_elevation"
+    android:importantForAccessibility="yes"
     android:orientation="vertical" />