Bug 1054087 - Turn on test_dom_input_event_on_htmleditor.html for Android. r=masayuki

Android's test runner passes this test, so I would like to run
test_dom_input_event_on_htmleditor.html even if Android.

Differential Revision: https://phabricator.services.mozilla.com/D13040

--HG--
extra : moz-landing-system : lando

editor/libeditor/tests/mochitest.ini

@@ -270,7 +270,6 @@ subsuite = clipboard
 [test_contenteditable_focus.html]
 [test_documentCharacterSet.html]
 [test_dom_input_event_on_htmleditor.html]
-skip-if = toolkit == 'android' # bug 1054087
 [test_dom_input_event_on_texteditor.html]
 [test_dragdrop.html]
 skip-if = os == 'android'