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

BUG=pdfium:288
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1476173003 .
diff --git a/core/src/fxge/android/fpf_skiafontmgr.cpp b/core/src/fxge/android/fpf_skiafontmgr.cpp
index a263416..f74d9ea 100644
--- a/core/src/fxge/android/fpf_skiafontmgr.cpp
+++ b/core/src/fxge/android/fpf_skiafontmgr.cpp
@@ -422,7 +422,8 @@
     } 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;
       }
     }