fix(dialog): iOS file picker default to file selection instead of photo (#1706)

.changes/fix-ios-file-dialog-default-mode.md

@@ -0,0 +1,5 @@
+---
+"dialog": patch:breaking
+---
+
+If no filters are specified, the file picker dialog now defaults to a file selection instead of photos.

plugins/dialog/ios/Sources/DialogPlugin.swift

@@ -48,7 +48,7 @@ class DialogPlugin: Plugin {
 
     let parsedTypes = parseFiltersOption(args.filters ?? [])
 
-    var isMedia = true
+    var isMedia = !parsedTypes.isEmpty
     var uniqueMimeType: Bool? = nil
     var mimeKind: String? = nil
     if !parsedTypes.isEmpty {