Fix the unbundled mainline module build

This change fixes two problems:

1) the prebuilt apexes are force disabled for the unbundled builds
because we need to build the modules from the source then

2) the dependencies from an sdk_library module to
*.stubs.{public|system|tests} are not added for the unbundled build
because the stubs modules are disabled.

Bug: 137282010
Test: unbundled mainline builds are successful
Test: build com.android.media and inspect the jar file to see if
hiddenapi flags are there
$ cd out/dist/mainline_modules_arm
$ unzip com.android.media.apex apex_payload.img
$ mkdir -p mnt
$ sudo mount -o ro,loop apex_payload.img mnt
$ dexdump2 mnt/javalib/updatable-media.jar | grep hiddenapi
shows results

Merged-In: I2c00af07aac4a15770d3acab011a36e2e4803bfc
Change-Id: I2c00af07aac4a15770d3acab011a36e2e4803bfc
(cherry picked from commit 53554e25593d6498a229d1dc89208aade4137008)
diff --git a/apex/apex.go b/apex/apex.go
index 04b667f..e5e5860 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -1327,10 +1327,13 @@
 }
 
 func (p *Prebuilt) DepsMutator(ctx android.BottomUpMutatorContext) {
-	// If the device is configured to use flattened APEX, don't set
-	// p.properties.Source so that the prebuilt module (which is
-	// a non-flattened APEX) is not used.
-	forceDisable := ctx.Config().FlattenApex() && !ctx.Config().UnbundledBuild()
+	// If the device is configured to use flattened APEX, force disable the prebuilt because
+	// the prebuilt is a non-flattened one.
+	forceDisable := ctx.Config().FlattenApex()
+
+	// Force disable the prebuilts when we are doing unbundled build. We do unbundled build
+	// to build the prebuilts themselves.
+	forceDisable = forceDisable || !ctx.Config().UnbundledBuild()
 
 	// b/137216042 don't use prebuilts when address sanitizer is on
 	forceDisable = forceDisable || android.InList("address", ctx.Config().SanitizeDevice()) ||
diff --git a/java/hiddenapi_singleton.go b/java/hiddenapi_singleton.go
index 9627dc6..09936ea 100644
--- a/java/hiddenapi_singleton.go
+++ b/java/hiddenapi_singleton.go
@@ -94,7 +94,7 @@
 	// Add the android.test.base to the set of stubs only if the android.test.base module is on
 	// the boot jars list as the runtime will only enforce hiddenapi access against modules on
 	// that list.
-	if inList("android.test.base", ctx.Config().BootJars()) {
+	if inList("android.test.base", ctx.Config().BootJars()) && !ctx.Config().UnbundledBuildUsePrebuiltSdks() {
 		publicStubModules = append(publicStubModules, "android.test.base.stubs")
 	}
 
diff --git a/java/sdk_library.go b/java/sdk_library.go
index 974131c..84be4dd 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -162,15 +162,20 @@
 var _ SdkLibraryDependency = (*SdkLibrary)(nil)
 
 func (module *SdkLibrary) DepsMutator(ctx android.BottomUpMutatorContext) {
+	useBuiltStubs := !ctx.Config().UnbundledBuildUsePrebuiltSdks()
 	// Add dependencies to the stubs library
-	ctx.AddVariationDependencies(nil, publicApiStubsTag, module.stubsName(apiScopePublic))
+	if useBuiltStubs {
+		ctx.AddVariationDependencies(nil, publicApiStubsTag, module.stubsName(apiScopePublic))
+	}
 	ctx.AddVariationDependencies(nil, publicApiFileTag, module.docsName(apiScopePublic))
 
 	if !Bool(module.properties.No_standard_libs) {
-		ctx.AddVariationDependencies(nil, systemApiStubsTag, module.stubsName(apiScopeSystem))
+		if useBuiltStubs {
+			ctx.AddVariationDependencies(nil, systemApiStubsTag, module.stubsName(apiScopeSystem))
+			ctx.AddVariationDependencies(nil, testApiStubsTag, module.stubsName(apiScopeTest))
+		}
 		ctx.AddVariationDependencies(nil, systemApiFileTag, module.docsName(apiScopeSystem))
 		ctx.AddVariationDependencies(nil, testApiFileTag, module.docsName(apiScopeTest))
-		ctx.AddVariationDependencies(nil, testApiStubsTag, module.stubsName(apiScopeTest))
 	}
 
 	module.Library.deps(ctx)