Add HiddenAPIScope to replace use of SdkKind

Previously, the hidden API processing used SdkKind to identify the API
scopes, e.g. public, system, etc. that are of interest for hidden API
processing. Unfortunately, there is a mismatch between the SdkKind and
what hidden API processing needs. e.g. SdkKind includes values that are
not used by hidden API processing and hidden API processing needs
additional API scope specific information not provided by SdkKind. The
apiScope struct used in sdk_library.go is also not a suitable
representation for similar reasons.

This change adds the HiddenAPIScope (following a similar approach as
apiScope) that rectifies that and uses it as a replacement for SdkKind
in most parts of the hidden API processing. The SdkKind is still used
for retrieving information from java_sdk_library[_import] modules.

Follow up changes will extend the HiddenAPIScope with more information.

Bug: 179354495
Test: m out/soong/hiddenapi/hiddenapi-flags.csv
      - make sure that this change has no effect on the generated flags.
Change-Id: I97968f58535121652852b8d25217aa288afd2bfd
diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index c7249b0..23e4e8d 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -121,6 +121,7 @@
 	BootclasspathFragmentCoverageAffectedProperties
 	Coverage BootclasspathFragmentCoverageAffectedProperties
 
+	// Hidden API related properties.
 	Hidden_api HiddenAPIFlagFileProperties
 
 	// Properties that allow a fragment to depend on other fragments. This is needed for hidden API
@@ -378,7 +379,7 @@
 func (b *BootclasspathFragmentModule) DepsMutator(ctx android.BottomUpMutatorContext) {
 	// Add dependencies onto all the modules that provide the API stubs for classes on this
 	// bootclasspath fragment.
-	hiddenAPIAddStubLibDependencies(ctx, b.properties.sdkKindToStubLibs())
+	hiddenAPIAddStubLibDependencies(ctx, b.properties.apiScopeToStubLibs())
 
 	if SkipDexpreoptBootJars(ctx) {
 		return
@@ -595,7 +596,7 @@
 		// Other bootclasspath_fragments that depend on this need the transitive set of stub dex jars
 		// from this to resolve any references from their code to classes provided by this fragment
 		// and the fragments this depends upon.
-		TransitiveStubDexJarsByKind: input.transitiveStubDexJarsByKind(),
+		TransitiveStubDexJarsByScope: input.transitiveStubDexJarsByScope(),
 	}
 
 	// The monolithic hidden API processing also needs access to all the output files produced by
@@ -640,7 +641,7 @@
 	input.extractFlagFilesFromProperties(ctx, &b.properties.Hidden_api)
 
 	// Store the stub dex jars from this module's fragment dependencies.
-	input.DependencyStubDexJarsByKind = dependencyHiddenApiInfo.TransitiveStubDexJarsByKind
+	input.DependencyStubDexJarsByScope = dependencyHiddenApiInfo.TransitiveStubDexJarsByScope
 
 	return input
 }