Build fails unless Android SDK Platform 25 is manually installed.

It isn't listed anywhere in dependencies, but `build.gradle` does reference file from there:

https://github.com/microg/android_packages_apps_UnifiedNlp/blob/b331309c66d399918f7b293ceb6c3533ad24af88/unifiednlp-compat/build.gradle#L28

Without manually installing Android SDK Platform 25 the build fails with a lot of errors like `error: package android.os does not exist`. By default only Android SDK Platform 27 is automatically installed. Is something missing in https://github.com/microg/android_packages_apps_UnifiedNlp/commit/b331309c66d399918f7b293ceb6c3533ad24af88, or should Android SDK Platform 25 be required explicitly (here or in https://github.com/microg/android_packages_apps_GmsCore, maybe just as additional step in [build instruction](https://github.com/microg/android_packages_apps_GmsCore/wiki/Building))?

Full error message: [build-fail.txt](https://github.com/microg/android_packages_apps_UnifiedNlp/files/1998889/build-fail.txt)

Start with unifiednlp-compat/build.gradle at the referenced line and compare its Android SDK references with the repository's build setup. Reproduce the failure with only the automatically installed Platform 27, then verify that a clean build succeeds after the required Platform 25 dependency or build instruction is addressed.

Written by the indexing model from the issue text.