title: Android: PDF files hidden despite setting the MIME type
body: <p>This is my Intent:</p>
  
  <pre><code>Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
  intent.setType("text/* , application/pdf, image/*");
  </code></pre>
  
  <p>But, when the file explorer shows up, the PDF files are grayed out i.e., un-choosable. Is there any workaround for this?</p>