In this version you cannot import a custom gallery skin since the button has disappeared, it literally is not there. I think it is for adding the new button of the skin customizer by Default like Steve and Alex, I think you guys understand me. I'm not sure if it also happens in Windows 10 but I think so, at least my android friends and I have this bug
MCPE-129582
The import skin button has disappeared
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We're tracking this issue in MCPE-128971, so this ticket is being resolved and linked as a duplicate.
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