Show "None" for media auto-download when all options are disabled.

Co-authored-by: jeffrey-signal <jeffrey@signal.org>

Closes signalapp/Signal-Android#14678

core/ui/src/main/java/org/signal/core/ui/compose/Rows.kt

@@ -219,16 +219,21 @@ object Rows {
     labels: Array<String>,
     values: Array<String>,
     selection: Array<String>,
+    noSelectionLabel: String,
     onSelectionChanged: (Array<String>) -> Unit
   ) {
     var displayDialog by remember { mutableStateOf(false) }
 
     TextRow(
       text = text,
-      label = selection.joinToString(", ") {
-        val index = values.indexOf(it)
-        if (index == -1) error("not found: $it in ${values.joinToString(", ")}")
-        labels[index]
+      label = if (selection.isNotEmpty()) {
+        selection.joinToString(", ") {
+          val index = values.indexOf(it)
+          if (index == -1) error("not found: $it in ${values.joinToString(", ")}")
+          labels[index]
+        }
+      } else {
+        noSelectionLabel
       },
       onClick = {
         displayDialog = true
@@ -698,6 +703,7 @@ private fun MultiSelectRowPreview() {
       labels = arrayOf("A", "B", "C"),
       values = arrayOf("a", "b", "c"),
       selection = selectedValues,
+      noSelectionLabel = "None",
       onSelectionChanged = {
         selectedValues = it
       }

core/ui/src/main/res/values/strings.xml

@@ -21,4 +21,5 @@
     <!-- StorageUtil -->
     <!-- Format string for displaying a storage path as volume/filename -->
     <string name="StorageUtil__s_s">%1$s/%2$s</string>
+
 </resources>