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/android/variable.go b/android/variable.go
index b238c4a..557b0b7 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -212,6 +212,7 @@
 	Platform_display_version_name          *string  `json:",omitempty"`
 	Platform_version_name                  *string  `json:",omitempty"`
 	Platform_sdk_version                   *int     `json:",omitempty"`
+	Platform_sdk_minor_version             *int     `json:",omitempty"`
 	Platform_sdk_codename                  *string  `json:",omitempty"`
 	Platform_sdk_version_or_codename       *string  `json:",omitempty"`
 	Platform_sdk_final                     *bool    `json:",omitempty"`