Handle RELEASE_PLATFORM_SDK_MINOR_VERSION

Teach Soong about the new RELEASE_PLATFORM_SDK_MINOR_VERSION build flag
which is used to set the minor Android API level.

Bug: 350458259
Test: m
Ignore-AOSP-First: internal to keep in sync with related CLs that are not AOSP first
Change-Id: I1f715ed9eeeb98ac526299ae5bc1be5b44b7ef19
diff --git a/scripts/gen_build_prop.py b/scripts/gen_build_prop.py
index c08a3fd..89e6f8d 100644
--- a/scripts/gen_build_prop.py
+++ b/scripts/gen_build_prop.py
@@ -196,6 +196,7 @@
     print(f"ro.build.display.id?={config['BuildDesc']}")
   print(f"ro.build.version.incremental={config['BuildNumber']}")
   print(f"ro.build.version.sdk={config['Platform_sdk_version']}")
+  print(f"ro.build.version.sdk_minor={build_flags['RELEASE_PLATFORM_SDK_MINOR_VERSION']}")
   print(f"ro.build.version.preview_sdk={config['Platform_preview_sdk_version']}")
   print(f"ro.build.version.preview_sdk_fingerprint={config['PlatformPreviewSdkFingerprint']}")
   print(f"ro.build.version.codename={config['Platform_sdk_codename']}")