Bug 1302423 - Disable some more unstable activesourcebuffer tests, a=testonly

MozReview-Commit-ID: GyMdnu7vucV

testing/web-platform/meta/media-source/mediasource-activesourcebuffers.html.ini

@@ -11,3 +11,9 @@
 
   [Active SourceBuffers must appear in the same order as they appear in the sourceBuffers attribute: video is first sourceBuffer, audio media appended first]
     disabled: https://bugzilla.mozilla.org/show_bug.cgi?id=1301409
+
+  [Active SourceBuffers must appear in the same order as they appear in the sourceBuffers attribute: audio is first sourceBuffer, audio media appended first]
+    disabled: true
+
+  [Active SourceBuffers must appear in the same order as they appear in the sourceBuffers attribute: video is first sourceBuffer, video media appended first]
+    disabled: true