Add missing absl dep.

Bug: b/36882554
Change-Id: I37e13338af8a2c75f56df283d20b1be4579074b4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266763
Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@google.com>
Cr-Commit-Position: refs/heads/main@{#37334}

modules/video_coding/BUILD.gn

@@ -1043,7 +1043,10 @@ if (rtc_include_tests) {
       "codecs/av1:libaom_av1_decoder",
       "//third_party/libyuv",
     ]
-    absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
+    absl_deps = [
+      "//third_party/abseil-cpp/absl/memory",
+      "//third_party/abseil-cpp/absl/types:optional",
+    ]
 
     data = video_coding_modules_tests_resources