FilesPicker 
  fun FilesPicker(files: List<AttachmentPickerItemState>, onItemSelected: (AttachmentPickerItemState) -> Unit, onBrowseFilesResult: (List<Uri>) -> Unit, modifier: Modifier = Modifier, itemContent: @Composable (AttachmentPickerItemState) -> Unit = {
        DefaultFilesPickerItem(
            fileItem = it,
            onItemSelected = onItemSelected,
        )
    })
Shows the UI for files the user can pick for message attachments. Exposes the logic of selecting items and browsing for extra files.
Parameters
files
The files the user can pick, to be rendered in a list.
onItemSelected  
Handler when the user clicks on any file item.
onBrowseFilesResult   
Handler when the user clicks on the browse more files action.
modifier
Modifier for styling.