buildinfo_prop generates ro.build.version.known_codenames

The sysprop is now generated as the corresponding Make variable
PLATFORM_VERSION_KNOWN_CODENAMES is imported.

Bug: 236602028
Test: atest ComposHostTestCases
Change-Id: Ife7e87ce5de65b57c51d5565e288807cf8360b28
diff --git a/android/buildinfo_prop.go b/android/buildinfo_prop.go
index 6339a71..acebdbb 100644
--- a/android/buildinfo_prop.go
+++ b/android/buildinfo_prop.go
@@ -89,6 +89,7 @@
 	writeProp("ro.build.version.security_patch", config.PlatformSecurityPatch())
 	writeProp("ro.build.version.base_os", config.PlatformBaseOS())
 	writeProp("ro.build.version.min_supported_target_sdk", config.PlatformMinSupportedTargetSdkVersion())
+	writeProp("ro.build.version.known_codenames", config.PlatformVersionKnownCodenames())
 
 	if config.Eng() {
 		writeProp("ro.build.type", "eng")
@@ -109,7 +110,6 @@
 		writeProp("ro.build.display.id", $BUILD_DISPLAY_ID)
 		writeProp("ro.build.version.incremental", $BUILD_NUMBER)
 		writeProp("ro.build.version.preview_sdk_fingerprint", $PLATFORM_PREVIEW_SDK_FINGERPRINT)
-		writeProp("ro.build.version.known_codenames", $PLATFORM_VERSION_KNOWN_CODENAMES)
 		writeProp("ro.build.version.release_or_preview_display", $PLATFORM_DISPLAY_VERSION)
 		writeProp("ro.build.date", `$DATE`)
 		writeProp("ro.build.date.utc", `$DATE +%s`)
diff --git a/android/config.go b/android/config.go
index ef71292..cd902cb 100644
--- a/android/config.go
+++ b/android/config.go
@@ -793,6 +793,10 @@
 	return String(c.productVariables.Platform_version_last_stable)
 }
 
+func (c *config) PlatformVersionKnownCodenames() string {
+	return String(c.productVariables.Platform_version_known_codenames)
+}
+
 func (c *config) MinSupportedSdkVersion() ApiLevel {
 	return uncheckedFinalApiLevel(19)
 }
diff --git a/android/variable.go b/android/variable.go
index 9478c0c..734ed1b 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -200,6 +200,7 @@
 	Platform_min_supported_target_sdk_version *string  `json:",omitempty"`
 	Platform_base_os                          *string  `json:",omitempty"`
 	Platform_version_last_stable              *string  `json:",omitempty"`
+	Platform_version_known_codenames          *string  `json:",omitempty"`
 
 	DeviceName                            *string  `json:",omitempty"`
 	DeviceProduct                         *string  `json:",omitempty"`