Simplify deapexer support

Uses the apex relative path to the file as the identifier that is used
to obtain the path to the corresponding file extracted from the apex.
That is instead of a special constructed string id.

Bug: 177892522
Test: m nothing
Merged-In: I5dc77c8fb272bac289b8891d1eac801e541af1f5
Change-Id: I5dc77c8fb272bac289b8891d1eac801e541af1f5
(cherry picked from commit b4bbf2ca10cc8509e3ae0ab104e9e3b55861831b)
diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index 07df165..03faf34 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -930,13 +930,12 @@
 	}
 
 	di := ctx.OtherModuleProvider(deapexerModule, android.DeapexerProvider).(android.DeapexerInfo)
-	name := module.BaseModuleName()
 	for _, variant := range imageConfig.apexVariants() {
 		arch := variant.target.Arch.ArchType
 		for _, toPath := range variant.imagesDeps {
+			apexRelativePath := apexRootRelativePathToBootImageFile(arch, toPath.Base())
 			// Get the path to the file that the deapexer extracted from the prebuilt apex file.
-			tag := createBootImageTag(arch, toPath.Base())
-			fromPath := di.PrebuiltExportPath(name, tag)
+			fromPath := di.PrebuiltExportPath(apexRelativePath)
 
 			// Copy the file to the predefined location.
 			ctx.Build(pctx, android.BuildParams{
@@ -967,19 +966,16 @@
 //
 // If there is no image config associated with this fragment then it returns nil. Otherwise, it
 // returns the files that are listed in the image config.
-func (module *prebuiltBootclasspathFragmentModule) RequiredFilesFromPrebuiltApex(ctx android.BaseModuleContext) map[string]string {
+func (module *prebuiltBootclasspathFragmentModule) RequiredFilesFromPrebuiltApex(ctx android.BaseModuleContext) []string {
 	imageConfig := module.getImageConfig(ctx)
 	if imageConfig != nil {
 		// Add the boot image files, e.g. .art, .oat and .vdex files.
-		files := map[string]string{}
-		name := module.BaseModuleName()
+		files := []string{}
 		for _, variant := range imageConfig.apexVariants() {
 			arch := variant.target.Arch.ArchType
 			for _, path := range variant.imagesDeps.Paths() {
 				base := path.Base()
-				tag := createBootImageTag(arch, base)
-				key := fmt.Sprintf("%s{%s}", name, tag)
-				files[key] = filepath.Join("javalib", arch.String(), base)
+				files = append(files, apexRootRelativePathToBootImageFile(arch, base))
 			}
 		}
 		return files
@@ -987,6 +983,10 @@
 	return nil
 }
 
+func apexRootRelativePathToBootImageFile(arch android.ArchType, base string) string {
+	return filepath.Join("javalib", arch.String(), base)
+}
+
 var _ android.RequiredFilesFromPrebuiltApex = (*prebuiltBootclasspathFragmentModule)(nil)
 
 func prebuiltBootclasspathFragmentFactory() android.Module {