Update virtual ab properties in misc_info.txt

Needed to build the super image correctly.

Bug: 390239238
Test: Built and diff'd make and soong's misc_info.txt files
Change-Id: I99fb0511109ddcd298cab3e22827e89211f66d63
diff --git a/android/variable.go b/android/variable.go
index d5b731a..08bcedf 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -654,6 +654,10 @@
 	BoardSuperPartitionGroups         map[string]BoardSuperPartitionGroupProps `json:",omitempty"`
 	ProductVirtualAbOta               bool                                     `json:",omitempty"`
 	ProductVirtualAbOtaRetrofit       bool                                     `json:",omitempty"`
+	ProductVirtualAbCompression       bool                                     `json:",omitempty"`
+	ProductVirtualAbCompressionMethod string                                   `json:",omitempty"`
+	ProductVirtualAbCompressionFactor string                                   `json:",omitempty"`
+	ProductVirtualAbCowVersion        string                                   `json:",omitempty"`
 	AbOtaUpdater                      bool                                     `json:",omitempty"`
 
 	// Avb (android verified boot) stuff