Allow Custom Skins and Skin Crossover For All of Minecraft: Bedrock Edition

Custom "classic" skins that are applied in the dressing room on one device should sync to every other device that is signed (or will sign) in to the same account. This should include console copies of Minecraft (Bedrock) as well. On Minecraft: Java Edition, players can upload a skin and it immediately updates on every device that plays the game on the account and is connected to the internet. The uploaded classic skins would continue to be affected by Bedrock's "Only Allow Trusted Skins" switch, showing up for the user of that skin and anyone who has turned off that toggle. For console-only players (and anyone else who might want to use it), there should be a part of the account section titled "Change Skin & Cape" like there is for Minecraft: Java Edition.