Update addon-developer-support and use Services global variable if possible

Services.jsm is planned to be removed in Firefox 117 cycle in https://bugzilla.mozilla.org/show_bug.cgi?id=1780695 . Services global variable is available in WebExtensions experiments API global from version 88 https://bugzilla.mozilla.org/show_bug.cgi?id=1698158 , and also available in all system globals from version 104 https://bugzilla.mozilla.org/show_bug.cgi?id=1667455 , and those code doesn't have to import Services.jsm for recent versions.