I tried use AppId "CC1AD845" in my android cast sender app. However, cast device didn't loaded any default media cast receiver.html, it still is on the Chromecast HomeScreen Page.
I changed it to my own whitelisted AppId and device load my receiver.html successfully.
"CC1AD845" is the constant value of CastMediaControlIntent.DEFAULT_MEDIA_RECEIVER_APPLICATION_ID.
Are you using the official Cast SDK for Android?? That has not yet been published, so I am assuming you are using the preview SDK. Please clarify. You cannot use the new app ids (such as the one you had mentioned) with the preview SDK.