[Tests] Add more PDFs. Some fail to convert.

Author: ViliusSutkus89

pdf2htmlEX/src/androidTest/assets/basic_text.pdf

@@ -45,8 +45,17 @@ public class InstrumentedTests {
 
   // PDFs must be places in pdf2htmlEX/src/androidTest/assets/
   private final String[] m_PDFsToTest = new String[] {
-    "fontfile3_opentype.pdf",
-    "fontfile3_opentype.pdf"
+//          Commented out PDFs do not pass the conversion test, for one reason or another.
+          "fontfile3_opentype.pdf",
+//          "basic_text.pdf",
+          "invalid_unicode_issue477.pdf",
+//          "pdf.pdf",
+          "sample.pdf"
+//          "geneve_1564.pdf",
+//          "svg_background_with_page_rotation_issue402.pdf",
+//          "test_fail.pdf",
+//          "with_form.pdf",
+//          "text_visibility.pdf"
   };
 
   private File extractAssetPDF(String filename) throws IOException {