Build proguard zips in soong-only builds

This builds the zips but doesn't dist them, I'll do that in a followup.

Bug: 395160816
Test: Diffed proguard-dict.zip proguard-usage.zip and proguard-dict-mapping.textproto between soong and make
Change-Id: Ic112427e4a2fdaf92a1d0a96d0f1c100b57be37a
diff --git a/java/dex.go b/java/dex.go
index 311657f..ed2df21 100644
--- a/java/dex.go
+++ b/java/dex.go
@@ -697,3 +697,13 @@
 
 	return javalibJar, artProfileOutputPath
 }
+
+type ProguardInfo struct {
+	ModuleName         string
+	Class              string
+	ProguardDictionary android.Path
+	ProguardUsageZip   android.Path
+	ClassesJar         android.Path
+}
+
+var ProguardProvider = blueprint.NewProvider[ProguardInfo]()