- https://github.com/GrapheneOS/platform_art/commit/0e277192c3e6f9d3c990e70239880c5cbffe2c1e
- https://github.com/GrapheneOS/platform_bionic/commit/17e9a9a86a2e3e64ebacdf14af7ca2a68e03eb4a
- https://github.com/GrapheneOS/platform_build/commit/85c5b9542771ef4d5f9337d0ae8d8f6df52689b5
- https://github.com/GrapheneOS/platform_frameworks_base/commit/ccd5bac1b400596bc35ca9ef4545eea623fdecee
- https://github.com/GrapheneOS/platform_libcore/commit/8d4383d15f9baed7665dbb459b29567e729b166d
- https://github.com/GrapheneOS/platform_packages_apps_GmsCompat
- https://github.com/GrapheneOS/platform_packages_apps_Settings/commit/550842c62ac693234b38fcaa0ed30692fae1873b
- https://github.com/GrapheneOS/platform_packages_apps_Settings/commit/7036f7190593cb3ce5e2eed5066c574388ba47a3
- https://github.com/GrapheneOS/platform_packages_modules_Connectivity/commit/039c4ab8f52da3142581bcf54a7719b47a360045
- https://github.com/GrapheneOS/platform_packages_modules_Permission/commit/e39e7b92aab23d7bd0b4684938b570d9ff7a5f1b
- https://github.com/GrapheneOS/platform_packages_modules_Wifi/commit/7ddba360b5e0a617cf884a4e75cd8afb7e0534de
- https://github.com/GrapheneOS/platform_packages_providers_DownloadProvider/commit/0bec1645c6f4cbcb3e58b1ff24c40479a0119c5f
- https://github.com/GrapheneOS/platform_frameworks_base/commit/96fa5e68ad8d0497b4225ab3dc28817490541110
- https://github.com/GrapheneOS/platform_frameworks_base/commit/53cc51441946422b2a9f50bd927bc64b67302304
- https://github.com/GrapheneOS/platform_packages_apps_Settings/commit/4c4a2f0df9c53eaf22b7add0305f0bfaac46695c
These are changes for the latest release of Android 12.1. There was a much less capable older implementation of the sandboxed Google Play compatibility layer for Android 11. Android 12 came out months later and it was ported to it. It has been substantially improved and largely rewritten since that point and there's no point starting from that. It would make more sense to port a device to Android 12 or at least to port this back to Android 11.