transitive Java deps for r8

The -libraryjars argument to r8 was missing transitive dependencies, and
so complained when there were classes used in the program JAR which were
not provided via libraries. This CL propagates transitive dependencies
to the r8 command to reduce the warnings that are generated for missing classes.

Bug: 242088131
Change-Id: Ifad7bc7c5d406e3de8d98ea963c97e88c84b45a1
diff --git a/java/app.go b/java/app.go
index 3c5760b..7eff4c3 100755
--- a/java/app.go
+++ b/java/app.go
@@ -1310,6 +1310,9 @@
 			ctx.AddVariationDependencies(nil, usesLibCompat28OptTag, dexpreopt.OptionalCompatUsesLibs28...)
 			ctx.AddVariationDependencies(nil, usesLibCompat30OptTag, dexpreopt.OptionalCompatUsesLibs30...)
 		}
+	} else {
+		ctx.AddVariationDependencies(nil, r8LibraryJarTag, u.usesLibraryProperties.Uses_libs...)
+		ctx.AddVariationDependencies(nil, r8LibraryJarTag, u.presentOptionalUsesLibs(ctx)...)
 	}
 }