Bug 1363957 - Disable dom/animation/test/mozilla/test_deferred_start.html on android/debug and win10 for frequent failures. r=me, a=test-only

dom/animation/test/mochitest.ini

@@ -104,6 +104,7 @@ support-files =
 [mozilla/test_cascade.html]
 [mozilla/test_cubic_bezier_limits.html]
 [mozilla/test_deferred_start.html]
+skip-if = (toolkit == 'android' && debug) || (os == 'win' && bits == 64) # Bug 1363957
 [mozilla/test_disable_animations_api_core.html]
 [mozilla/test_disabled_properties.html]
 [mozilla/test_discrete-animations.html]