Add contribute_to_android_api property in java_sdk_library

The default-false bool property `contribute_to_android_api` will be used to signify whether the java_sdk_library module contributes to an api
surface (i.e. listed in frameworks-base-api.bootclasspath or not).
If the property is set to true, the module's stub jar can be
generated from .txt files.

Currently, the property is a no-op. The property will be utilized in the
child changes.

Test: m nothing
Bug: 276958307
Change-Id: I617802ec352c7055579ce92ea3de43f10cac1da4
diff --git a/java/sdk_library.go b/java/sdk_library.go
index ea45174..fb27812 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -624,6 +624,13 @@
 		Legacy_errors_allowed *bool
 	}
 
+	// Determines if the module contributes to any api surfaces.
+	// This property should be set to true only if the module is listed under
+	// frameworks-base-api.bootclasspath in frameworks/base/api/Android.bp.
+	// Otherwise, this property should be set to false.
+	// Defaults to false.
+	Contribute_to_android_api *bool
+
 	// TODO: determines whether to create HTML doc or not
 	// Html_doc *bool
 }
@@ -1966,6 +1973,10 @@
 	return module.uniqueApexVariations()
 }
 
+func (module *SdkLibrary) ContributeToApi() bool {
+	return proptools.BoolDefault(module.sdkLibraryProperties.Contribute_to_android_api, false)
+}
+
 // Creates the xml file that publicizes the runtime library
 func (module *SdkLibrary) createXmlFile(mctx android.DefaultableHookContext) {
 	moduleMinApiLevel := module.Library.MinSdkVersion(mctx)