Vending: Fix Purchase API issues

[DaVinci9196]

1. Added a missing checkIn parameter and fixed the missing content returned by the vending detail API.
2. Added deviceConfig API and fixed the issue of the purchase API returning a 400 error.

[beastdrc]

@DaVinci9196 Am I correct that it will resolve issues with in-app purchases? I have issues with FaceApp - it wont get licence from Play Store (Huawei Device)
MicroG on Huawei no errors, it receives pricing, but can't get licence (or wont get licence):
03-16 21:39:48.863 11170 11246 D Billing : Result: Bundle[{DEBUG_MESSAGE=, RESPONSE_CODE=0}] 03-16 21:39:48.863 11170 11246 D Billing : isBillingSupported(apiVersion=25, packageName=io.faceapp, type=subs)=Bundle[{DEBUG_MESSAGE=, RESPONSE_CODE=0}] 03-16 21:39:48.864 11170 11246 D Billing : Result: Bundle[{DEBUG_MESSAGE=, RESPONSE_CODE=0}] 03-16 21:39:48.864 11170 11246 D Billing : isBillingSupported(apiVersion=25, packageName=io.faceapp, type=inapp)=Bundle[{DEBUG_MESSAGE=, RESPONSE_CODE=0}]

Android 15 Lineage OS + Gapps

03-16 22:01:52.593 8196 8244 I Finsky : [45] io.faceapp: Account determined from installer data - [8_OSEtGFSOfTV****g3prfpxnUMzlgmrE] 03-16 22:01:52.593 8196 8244 I Finsky : [45] Billing preferred account via installer for io.faceapp: [8_OSEtGFSOfTV8****xUg3prfpxnUMzlgmrE] 03-16 22:01:52.603 9836 9971 I DynamiteModule: Considering local module com.google.mlkit.dynamite.face:10000 and remote module com.google.mlkit.dynamite.face:0 03-16 22:01:52.603 9836 9971 I DynamiteModule: Selected local version of com.google.mlkit.dynamite.face 03-16 22:01:52.605 8196 8244 I Finsky : [45] io.faceapp: Account determined from installer data - [8_OSEtGFSO***rfpxnUMzlgmrE] 03-16 22:01:52.605 8196 8244 I Finsky : [45] Billing preferred account via installer for io.faceapp: [8_OSEtGFSOf***fpxnUMzlgmrE]

[DaVinci9196]

@beastdrc This fixes a problem with the automatic database entry function and is unrelated to IAP. The issue of IAP failing to launch is addressed in another PR.

[beastdrc]

@DaVinci9196 Thanks could you please give a link or mention me in PR you talking about

[DaVinci9196]

@DaVinci9196 Thanks could you please give a link or mention me in PR you talking about

#3332