Change AVIF animated images to the .avif extension

The image/avif-sequence MIME type and the associated file extension
"avifs" have been removed from the AVIF specification. See
https://github.com/AOMediaCodec/av1-avif/issues/59
https://github.com/AOMediaCodec/av1-avif/pull/86

Add "-animated-" to the filenames so it's clear they are animated images.

Change-Id: Ifd46d9c40430a5a60ada28fdede0cb232f56f75f
Bug: 1147501
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2528169
Commit-Queue: Wan-Teh Chang <wtc@google.com>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825937}

third_party/blink/renderer/platform/image-decoders/avif/avif_image_decoder_test.cc

@@ -628,29 +628,33 @@ void TestYUVRed(const char* file_name,
 
 TEST(AnimatedAVIFTests, ValidImages) {
   TestByteByByteDecode(&CreateAVIFDecoder,
-                       "/images/resources/avif/star-8bpc.avifs", 5u,
-                       kAnimationLoopInfinite);
-  TestByteByByteDecode(&CreateAVIFDecoder,
-                       "/images/resources/avif/star-8bpc-with-alpha.avifs", 5u,
-                       kAnimationLoopInfinite);
-  TestByteByByteDecode(&CreateAVIFDecoder,
-                       "/images/resources/avif/star-10bpc.avifs", 5u,
-                       kAnimationLoopInfinite);
-  TestByteByByteDecode(&CreateAVIFDecoder,
-                       "/images/resources/avif/star-10bpc-with-alpha.avifs", 5u,
+                       "/images/resources/avif/star-animated-8bpc.avif", 5u,
                        kAnimationLoopInfinite);
+  TestByteByByteDecode(
+      &CreateAVIFDecoder,
+      "/images/resources/avif/star-animated-8bpc-with-alpha.avif", 5u,
+      kAnimationLoopInfinite);
   TestByteByByteDecode(&CreateAVIFDecoder,
-                       "/images/resources/avif/star-12bpc.avifs", 5u,
+                       "/images/resources/avif/star-animated-10bpc.avif", 5u,
                        kAnimationLoopInfinite);
+  TestByteByByteDecode(
+      &CreateAVIFDecoder,
+      "/images/resources/avif/star-animated-10bpc-with-alpha.avif", 5u,
+      kAnimationLoopInfinite);
   TestByteByByteDecode(&CreateAVIFDecoder,
-                       "/images/resources/avif/star-12bpc-with-alpha.avifs", 5u,
+                       "/images/resources/avif/star-animated-12bpc.avif", 5u,
                        kAnimationLoopInfinite);
-  // TODO(ryoh): Add avifs with EditListBox.
+  TestByteByByteDecode(
+      &CreateAVIFDecoder,
+      "/images/resources/avif/star-animated-12bpc-with-alpha.avif", 5u,
+      kAnimationLoopInfinite);
+  // TODO(ryoh): Add animated avif files with EditListBox.
 }
 
 TEST(AnimatedAVIFTests, HasMultipleSubImages) {
   std::unique_ptr<ImageDecoder> decoder = CreateAVIFDecoder();
-  decoder->SetData(ReadFile("/images/resources/avif/star-8bpc.avifs"), true);
+  decoder->SetData(ReadFile("/images/resources/avif/star-animated-8bpc.avif"),
+                   true);
   EXPECT_TRUE(decoder->ImageHasBothStillAndAnimatedSubImages());
 }