Android: look for OTF files as well as TTF and TTC.

core/src/fxge/android/fpf_skiafontmgr.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/include/fxcrt/fx_ext.h"
 #include "fx_fpf.h"
 
 #if _FX_OS_ == _FX_ANDROID_
@@ skipping 404 matching lines @@
   CFX_ByteString filename;
   FX_BOOL bFolder = FALSE;
   while (FX_GetNextFile(handle, filename, bFolder)) {
     if (bFolder) {
       if (filename == FX_BSTRC(".") || filename == FX_BSTRC("..")) {
         continue;
       }
     } else {
       CFX_ByteString ext = filename.Right(4);
       ext.MakeLower();
-      if (ext != FX_BSTRC(".ttf") && ext != FX_BSTRC(".ttc")) {
+      if (ext != FX_BSTRC(".ttf") && ext != FX_BSTRC(".ttc") &&
+          ext != FX_BSTRC(".otf")) {
         continue;
       }
     }
     CFX_ByteString fullpath = path;
     fullpath += "/";
     fullpath += filename;
     if (bFolder) {
       ScanPath(fullpath);
     } else {
       ScanFile(fullpath);
@@ skipping 86 matching lines @@
   }
   if (pOS2 && (pOS2->ulCodePageRange1 & (1 << 31))) {
     pFontDesc->m_dwStyle |= FXFONT_SYMBOLIC;
   }
   pFontDesc->m_dwCharsets = FPF_SkiaGetFaceCharset(pOS2);
   pFontDesc->m_iFaceIndex = face->face_index;
   pFontDesc->m_iGlyphNum = face->num_glyphs;
 }
 void CFPF_SkiaFontMgr::OutputSystemFonts() {}
 #endif