Ensure the 'Add Widget' button icon is not announced

This fixes the issue that TalkBack announces twice "Add widgets"
when focus on the "+ Add widgets" button in the empty state hub.

Fixes: 378580523
Flag: EXEMPT bugfix
Test: manually with TalkBack on
Change-Id: I2969c1ea4d6ee0fdd7505ae63ecd8c7388e3a5ce
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/CommunalHub.kt b/packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/CommunalHub.kt
index cc2a427..59e18e7 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/CommunalHub.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/CommunalHub.kt
@@ -1065,8 +1065,7 @@
                 ) {
                     Icon(
                         imageVector = Icons.Default.Add,
-                        contentDescription =
-                            stringResource(R.string.label_for_button_in_empty_state_cta),
+                        contentDescription = null,
                         modifier = Modifier.size(24.dp),
                     )
                     Spacer(Modifier.width(ButtonDefaults.IconSpacing))