Apply PRODUCT_ENFORCE_RRO_TARGETS to dependencies.

With this change, users don't need to figure out which libraries
actually hold the resources to be overlaid when targetting apps with a
core lib dependency (e.g. Settings, SystemUI).

Fixes: 169898727
Test: app_test.go
Change-Id: I3c3b9dc0a377b1828db1199858a73d080a173205

android/config.go

@@ -916,6 +916,10 @@ func (c *config) EnforceRROForModule(name string) bool {
 	return false
 }
 
+func (c *config) EnforceRROExemptedForModule(name string) bool {
+	return InList(name, c.productVariables.EnforceRROExemptedTargets)
+}
+
 func (c *config) EnforceRROExcludedOverlay(path string) bool {
 	excluded := c.productVariables.EnforceRROExcludedOverlays
 	if len(excluded) > 0 {