Render annotation in annotation_ink_multiple.pdf.

It has a CPDF_Annot::Subtype::INK for which we seek to generate
an "appearance" during the test.

Change-Id: I1fa34599267c1e8b555e08be3c567508f425fa7c
Reviewed-on: https://pdfium-review.googlesource.com/c/45171
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/fpdf_annot_embeddertest.cpp b/fpdfsdk/fpdf_annot_embeddertest.cpp
index 777d821..33788b4 100644
--- a/fpdfsdk/fpdf_annot_embeddertest.cpp
+++ b/fpdfsdk/fpdf_annot_embeddertest.cpp
@@ -214,6 +214,10 @@
     EXPECT_EQ(475.336090f, rect.right);
     EXPECT_EQ(681.535034f, rect.top);
   }
+  {
+    ScopedFPDFBitmap bitmap = RenderLoadedPageWithFlags(page, FPDF_ANNOT);
+    CompareBitmap(bitmap.get(), 612, 792, "354002e1c4386d38fdde29ef8d61074a");
+  }
   UnloadPageNoEvents(page);
 }
 
@@ -458,7 +462,6 @@
   }
 
   FPDFPage_CloseAnnot(squareAnnot);
-
   UnloadPage(page);
 }