fix：修正由于dom速度原因导致的可能play的时候document还未创建的报错

AgoraRTCSDK.min.js

@@ -3297,7 +3297,7 @@ function(e, t) {
 					volume: null
 				},
 					i = h()({}, n, e.options);
-				!0 !== i.muted || i.volume || (i.volume = 0), i.autoplay && t.video.setAttribute("autoplay", ""), !0 !== i.muted && "video_element_muted" !== i.muted || (t.video.setAttribute("muted", ""), t.video.muted = !0), i.playsinline && t.video.setAttribute("playsinline", ""), i.controls && t.video.setAttribute("controls", ""), Number.isFinite(i.volume) && (t.video.volume = i.volume), t.audio = document.createElement("audio"), t.audio.setAttribute("id", "audio" + t.id), i.autoplay && t.audio.setAttribute("autoplay", ""), !0 === i.muted && t.audio.setAttribute("muted", ""), !0 === i.muted && (t.audio.muted = !0), i.playsinline && t.audio.setAttribute("playsinline", ""), Number.isFinite(i.volume) && (t.audio.volume = i.volume), void 0 !== t.elementID ? (document.getElementById(t.elementID).appendChild(t.div), t.container = document.getElementById(t.elementID)) : (document.body.appendChild(t.div), t.container = document.body), t.parentNode = t.div.parentNode;
+				!0 !== i.muted || i.volume || (i.volume = 0), i.autoplay && t.video.setAttribute("autoplay", ""), !0 !== i.muted && "video_element_muted" !== i.muted || (t.video.setAttribute("muted", ""), t.video.muted = !0), i.playsinline && t.video.setAttribute("playsinline", ""), i.controls && t.video.setAttribute("controls", ""), Number.isFinite(i.volume) && (t.video.volume = i.volume), t.audio = document.createElement("audio"), t.audio.setAttribute("id", "audio" + t.id), i.autoplay && t.audio.setAttribute("autoplay", ""), !0 === i.muted && t.audio.setAttribute("muted", ""), !0 === i.muted && (t.audio.muted = !0), i.playsinline && t.audio.setAttribute("playsinline", ""), Number.isFinite(i.volume) && (t.audio.volume = i.volume), void 0 !== t.elementID && document.getElementById(t.elementID) !== null ? (document.getElementById(t.elementID).appendChild(t.div), t.container = document.getElementById(t.elementID)) : (document.body.appendChild(t.div), t.container = document.body), t.parentNode = t.div.parentNode;
 				var a = {
 					video: {
 						playerId: t.playerId,