Revert "Do not cache bag parent stack until requested"

Revert "Move map_ptr to incfs namspace"

Revert submission 12787270

Reason for revert: b/173250495
Reverted Changes:
I5cd1bc8a2:libandroidfw hardening for IncFs
Ice5dbcfb2:Move map_ptr to incfs namspace
I29ccdc8ed:Do not cache bag parent stack until requested
I1e9e9acaa:Cache resolved theme values

Change-Id: Ib06f254ca4ac6fdec1f9cf75e6fdab35c7d4fb32
diff --git a/libs/androidfw/AssetManager2.cpp b/libs/androidfw/AssetManager2.cpp
index c49dc28..d349628 100644
--- a/libs/androidfw/AssetManager2.cpp
+++ b/libs/androidfw/AssetManager2.cpp
@@ -1036,7 +1036,9 @@
 
 base::expected<const ResolvedBag*, NullOrIOError> AssetManager2::GetBag(uint32_t resid) const {
   std::vector<uint32_t> found_resids;
-  return GetBag(resid, found_resids);
+  const auto bag = GetBag(resid, found_resids);
+  cached_bag_resid_stacks_.emplace(resid, found_resids);
+  return bag;
 }
 
 base::expected<const ResolvedBag*, NullOrIOError> AssetManager2::GetBag(