Implement filter-product

filter-product option is added to aapt2 compile, which filters values
with a given product and removes all other values (including default).
The motivation of this change is to generate product-specific RRO
automatically, making a main resource APK (e.g. framework-res.apk)
identical in all targets.

Bug: 294799593
Test: build
Change-Id: I42eb3e134c7aa120f6bbe2d26d311bd46b586595
diff --git a/tools/aapt2/link/Linkers.h b/tools/aapt2/link/Linkers.h
index 44cd276..18165f7 100644
--- a/tools/aapt2/link/Linkers.h
+++ b/tools/aapt2/link/Linkers.h
@@ -20,12 +20,12 @@
 #include <set>
 #include <unordered_set>
 
-#include "android-base/macros.h"
-#include "androidfw/ConfigDescription.h"
-#include "androidfw/StringPiece.h"
-
 #include "Resource.h"
 #include "SdkConstants.h"
+#include "android-base/macros.h"
+#include "android-base/result.h"
+#include "androidfw/ConfigDescription.h"
+#include "androidfw/StringPiece.h"
 #include "process/IResourceTableConsumer.h"
 #include "xml/XmlDom.h"
 
@@ -92,28 +92,6 @@
   DISALLOW_COPY_AND_ASSIGN(PrivateAttributeMover);
 };
 
-class ResourceConfigValue;
-
-class ProductFilter : public IResourceTableConsumer {
- public:
-  using ResourceConfigValueIter = std::vector<std::unique_ptr<ResourceConfigValue>>::iterator;
-
-  explicit ProductFilter(std::unordered_set<std::string> products) : products_(products) {
-  }
-
-  ResourceConfigValueIter SelectProductToKeep(const ResourceNameRef& name,
-                                              const ResourceConfigValueIter begin,
-                                              const ResourceConfigValueIter end,
-                                              android::IDiagnostics* diag);
-
-  bool Consume(IAaptContext* context, ResourceTable* table) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ProductFilter);
-
-  std::unordered_set<std::string> products_;
-};
-
 // Removes namespace nodes and URI information from the XmlResource.
 //
 // Once an XmlResource is processed by this consumer, it is no longer able to have its attributes