Bug 1564516 - Disable media-source web-platform-tests that are unstable on geckoview; a=testonly

--HG--
extra : rebase_source : 7d4c9410209a668f8a8285527b40c718106fdd43

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

@@ -1,3 +1,8 @@
 [mediasource-endofstream.html]
   disabled:
     if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1381449
+    if (os == "android") and debug: Frequently failing on geckoview
+  [MediaSource.endOfStream(): media element notified that it now has all of the media data]
+    disabled:
+      if (os == "android") and debug: Frequently failing on geckoview (Bug 1381449)
+

testing/web-platform/meta/media-source/mediasource-seek-during-pending-seek.html.ini

@@ -1,4 +1,7 @@
 [mediasource-seek-during-pending-seek.html]
   disabled:
-    if (os == "android"): https://bugzilla.mozilla.org/show_bug.cgi?id=1499003 https://bugzilla.mozilla.org/show_bug.cgi?id=1563134
+    if (os == "android") and not e10s: https://bugzilla.mozilla.org/show_bug.cgi?id=1499003
   expected: ERROR
+  [Test seeking to a new location during a pending seek.]
+    disabled:
+      if (os == "android"): Frequently failing on geckoview (Bug 1563134), Bug 1553057