Convert JavaInfoProvider to *JavaInfo

Convert JavaInfoProvider to return a *JavaInfo instead of a JavaInfo.
This will reduce copying when reading the provider, and also allows
JavaInfo to recursively contain a depset of JavaInfos from
dependencies.

Bug: 308016794
Test: go test ./java/...
Flag: EXEMPT refactor
Change-Id: Ibf6d9b797f760ad1fe815d59839839fdfad91733
diff --git a/java/hiddenapi.go b/java/hiddenapi.go
index 689c78f..b1a9deb 100644
--- a/java/hiddenapi.go
+++ b/java/hiddenapi.go
@@ -98,8 +98,9 @@
 	// processing.
 	classesJars := android.Paths{classesJar}
 	ctx.VisitDirectDepsWithTag(hiddenApiAnnotationsTag, func(dep android.Module) {
-		javaInfo, _ := android.OtherModuleProvider(ctx, dep, JavaInfoProvider)
-		classesJars = append(classesJars, javaInfo.ImplementationJars...)
+		if javaInfo, ok := android.OtherModuleProvider(ctx, dep, JavaInfoProvider); ok {
+			classesJars = append(classesJars, javaInfo.ImplementationJars...)
+		}
 	})
 	h.classesJarPaths = classesJars