Update image_transformer_other.in and suppress it for SkiaPaths and AGG.

Acrobat Reader reports error when rendering image `ImMonoPalette` in
image_transformer_other.in since there is no need to use the filter to
decode the stream.

This CL removes the extra "/Filter" entry and updates the expectation
of this test to align with Acrobat's rendering result, in which the
diamond shape on the bottom left is rendered in two-tone. Also, suppress
this test for AGG and SkiaPaths until crbug.com/pdfium/1750 is fixed.

Bug: pdfium:1750
Change-Id: I91ec7ca5b56aa181558fe04b3ab6d5da2e4f51c7
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/89853
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
diff --git a/testing/SUPPRESSIONS b/testing/SUPPRESSIONS
index 41ed862..e7f7c01 100644
--- a/testing/SUPPRESSIONS
+++ b/testing/SUPPRESSIONS
@@ -387,7 +387,7 @@
 bug_966263.in * * * skia
 
 # TODO(pdfium:1750): Remove after associated bug is fixed
-image_transformer_other.in * * * skia
+image_transformer_other.in * * * *
 
 # TODO(pdfiu,:1310): Remove after associated bug is fixed
 radial_shading_point_at_border.in * * * skia,skiapaths
diff --git a/testing/resources/pixel/image_transformer_other.in b/testing/resources/pixel/image_transformer_other.in
index 41bbd4a..5d1f580 100644
--- a/testing/resources/pixel/image_transformer_other.in
+++ b/testing/resources/pixel/image_transformer_other.in
@@ -62,7 +62,6 @@
   /Subtype /Image
   /BitsPerComponent 1
   /ColorSpace 5 0 R
-  /Filter /ASCIIHexDecode
   /Height 4
   /Width 4
   {{streamlen}}
diff --git a/testing/resources/pixel/image_transformer_other_expected.pdf.0.png b/testing/resources/pixel/image_transformer_other_expected.pdf.0.png
index 95fa697..e9aab95 100644
--- a/testing/resources/pixel/image_transformer_other_expected.pdf.0.png
+++ b/testing/resources/pixel/image_transformer_other_expected.pdf.0.png
Binary files differ