build: compile against Android 37.2

[bmc08gt]

Dependabot's haze 2.0.0-beta03 bump (#1443) fails at configuration:

Dependency 'dev.chrisbanes.haze:haze-blur-materials-android:2.0.0-beta03'
requires libraries and applications that depend on it to compile against
version 37.2 or later of the Android APIs.
:apps:flipcash:shared:persistence:db is currently compiled against android-37.0.

The catalog holds compileSdk as an integer and every consumer calls .toInt(), so there was nowhere to put a minor version. AGP 9.4.0 takes one through a spec block instead:

compileSdk {
    version = release(37) { minorApiLevel = 2 }
}

That form is the only one available on both CommonExtension and KotlinMultiplatformAndroidLibraryExtension — the KMP extension has no compileSdkMinor property — so all twelve sites use it.

Nine of those sites are KMP modules that hardcoded compileSdk = 37 rather than reading the catalog, which is why this is a twelve-site change instead of a one-line one. They now read android-compileSdk and android-compileSdkMinor like everything else.

Build.VERSION.SDK_INT still reports 37; only SDK_INT_FULL carries the minor, so no runtime behaviour changes.

CI needs SDK Platform 37.2. The workflow has no explicit platform install step, and android.builder.sdkDownload is unset (defaults on), so AGP downloads it the same way it obtains 37.0 today.

Unblocks #1443.