Can play store in-app purchases be transferred among devices if I use the same Google account to make the purchases? I recently purchased "Minecraft pocket edition" from playstore with my Google account. Me and my girlfriend are both using the same Google account and hence we have both been able to play the game. Recently I've been thinking of buying some texture packs and mash-up packs. If I do in-app purchase of these, will it only be available to me or can we both use it?(since we're both using the same Google account)

PS : We both have different Xbox accounts which we use to play the game, but the Google account is the same
I don’t know about Minecraft or Xbox accounts but as far as Google accounts go, anything purchased on one devise is available on all of the other devices registered to that account.