Don't add apex_set deps in nondeterministic order

Test: unit tests
Change-Id: I97a9708cb6e5a4f3aef55697b6127f61e4d17720
diff --git a/apex/prebuilt.go b/apex/prebuilt.go
index cae507e..31cecf1 100644
--- a/apex/prebuilt.go
+++ b/apex/prebuilt.go
@@ -316,31 +316,29 @@
 	}
 }
 
-func (p *prebuiltCommon) getExportedDependencies() map[string]exportedDependencyTag {
-	dependencies := make(map[string]exportedDependencyTag)
-
-	for _, dep := range p.prebuiltCommonProperties.Exported_java_libs {
-		dependencies[dep] = exportedJavaLibTag
-	}
-
-	for _, dep := range p.prebuiltCommonProperties.Exported_bootclasspath_fragments {
-		dependencies[dep] = exportedBootclasspathFragmentTag
-	}
-
-	for _, dep := range p.prebuiltCommonProperties.Exported_systemserverclasspath_fragments {
-		dependencies[dep] = exportedSystemserverclasspathFragmentTag
-	}
-
-	return dependencies
+func (p *prebuiltCommon) hasExportedDeps() bool {
+	return len(p.prebuiltCommonProperties.Exported_java_libs) > 0 ||
+		len(p.prebuiltCommonProperties.Exported_bootclasspath_fragments) > 0 ||
+		len(p.prebuiltCommonProperties.Exported_systemserverclasspath_fragments) > 0
 }
 
 // prebuiltApexContentsDeps adds dependencies onto the prebuilt apex module's contents.
 func (p *prebuiltCommon) prebuiltApexContentsDeps(ctx android.BottomUpMutatorContext) {
 	module := ctx.Module()
 
-	for dep, tag := range p.getExportedDependencies() {
+	for _, dep := range p.prebuiltCommonProperties.Exported_java_libs {
 		prebuiltDep := android.PrebuiltNameFromSource(dep)
-		ctx.AddDependency(module, tag, prebuiltDep)
+		ctx.AddDependency(module, exportedJavaLibTag, prebuiltDep)
+	}
+
+	for _, dep := range p.prebuiltCommonProperties.Exported_bootclasspath_fragments {
+		prebuiltDep := android.PrebuiltNameFromSource(dep)
+		ctx.AddDependency(module, exportedBootclasspathFragmentTag, prebuiltDep)
+	}
+
+	for _, dep := range p.prebuiltCommonProperties.Exported_systemserverclasspath_fragments {
+		prebuiltDep := android.PrebuiltNameFromSource(dep)
+		ctx.AddDependency(module, exportedSystemserverclasspathFragmentTag, prebuiltDep)
 	}
 }
 
@@ -608,7 +606,7 @@
 // the listed modules need access to files from within the prebuilt .apex file.
 func (p *prebuiltCommon) createDeapexerModuleIfNeeded(ctx android.TopDownMutatorContext, deapexerName string, apexFileSource string) {
 	// Only create the deapexer module if it is needed.
-	if len(p.getExportedDependencies()) == 0 {
+	if !p.hasExportedDeps() {
 		return
 	}