Re-enable SvcTestAV1/SvcTest.ScalabilityModeSupported/L2T2_DD

Issue has been fixed in latest libaom code rolled into webrtc.

Bug: webrtc:15722
Change-Id: I5e00e202e929703a9af05422884cfb5d0829964b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/331862
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Marco Paniconi <marpan@google.com>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Owners-Override: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41407}
diff --git a/pc/test/svc_e2e_tests.cc b/pc/test/svc_e2e_tests.cc
index 9a32318..3fde5a4 100644
--- a/pc/test/svc_e2e_tests.cc
+++ b/pc/test/svc_e2e_tests.cc
@@ -466,8 +466,7 @@
                 SvcTestParameters::Create(kAv1CodecName, "L2T1"),
                 SvcTestParameters::Create(kAv1CodecName, "L2T1h"),
                 SvcTestParameters::Create(kAv1CodecName, "L2T1_KEY"),
-                // TODO: bugs.webrtc.org/15722 - Investigate and reenable.
-                // SvcTestParameters::Create(kAv1CodecName, "L2T2"),
+                SvcTestParameters::Create(kAv1CodecName, "L2T2"),
                 SvcTestParameters::Create(kAv1CodecName, "L2T2h"),
                 SvcTestParameters::Create(kAv1CodecName, "L2T2_KEY"),
                 SvcTestParameters::Create(kAv1CodecName, "L2T2_KEY_SHIFT"),