Load app resource as shared library.

- Added aapt command line flag --app-as-shared-lib to build app resources
  that could be loaded as shared lib at runtime.
- Added new method AssetManager.addAssetPathAsSharedLibrary() to load an
  app resource as shared library.

Bug 22487604

Change-Id: Ib9b33c35f9c2b7129f3ba205de03d4564623ea39
diff --git a/include/androidfw/AssetManager.h b/include/androidfw/AssetManager.h
index 0cfd2b1..3d4e47d 100644
--- a/include/androidfw/AssetManager.h
+++ b/include/androidfw/AssetManager.h
@@ -93,13 +93,14 @@
      * look in multiple places for assets.  It can be either a directory (for
      * finding assets as raw files on the disk) or a ZIP file.  This newly
      * added asset path will be examined first when searching for assets,
-     * before any that were previously added.
+     * before any that were previously added, the assets are added as shared
+     * library if appAsLib is true.
      *
      * Returns "true" on success, "false" on failure.  If 'cookie' is non-NULL,
      * then on success, *cookie is set to the value corresponding to the
      * newly-added asset source.
      */
-    bool addAssetPath(const String8& path, int32_t* cookie);
+    bool addAssetPath(const String8& path, int32_t* cookie, bool appAsLib=false);
     bool addOverlayPath(const String8& path, int32_t* cookie);
 
     /*                                                                       
@@ -280,7 +281,7 @@
     const ResTable* getResTable(bool required = true) const;
     void setLocaleLocked(const char* locale);
     void updateResourceParamsLocked() const;
-    bool appendPathToResTable(const asset_path& ap) const;
+    bool appendPathToResTable(const asset_path& ap, bool appAsLib=false) const;
 
     Asset* openIdmapLocked(const struct asset_path& ap) const;
 
diff --git a/include/androidfw/ResourceTypes.h b/include/androidfw/ResourceTypes.h
index eff1f5f..49b6333 100644
--- a/include/androidfw/ResourceTypes.h
+++ b/include/androidfw/ResourceTypes.h
@@ -1505,7 +1505,7 @@
 class DynamicRefTable
 {
 public:
-    DynamicRefTable(uint8_t packageId);
+    DynamicRefTable(uint8_t packageId, bool appAsLib);
 
     // Loads an unmapped reference table from the package.
     status_t load(const ResTable_lib_header* const header);
@@ -1530,6 +1530,7 @@
     const uint8_t                   mAssignedPackageId;
     uint8_t                         mLookupTable[256];
     KeyedVector<String16, uint8_t>  mEntries;
+    bool                            mAppAsLib;
 };
 
 bool U16StringToInt(const char16_t* s, size_t len, Res_value* outValue);
@@ -1547,10 +1548,11 @@
 
     status_t add(const void* data, size_t size, const int32_t cookie=-1, bool copyData=false);
     status_t add(const void* data, size_t size, const void* idmapData, size_t idmapDataSize,
-            const int32_t cookie=-1, bool copyData=false);
+            const int32_t cookie=-1, bool copyData=false, bool appAsLib=false);
 
     status_t add(Asset* asset, const int32_t cookie=-1, bool copyData=false);
-    status_t add(Asset* asset, Asset* idmapAsset, const int32_t cookie=-1, bool copyData=false);
+    status_t add(Asset* asset, Asset* idmapAsset, const int32_t cookie=-1, bool copyData=false,
+            bool appAsLib=false);
 
     status_t add(ResTable* src);
     status_t addEmpty(const int32_t cookie);
@@ -1858,7 +1860,7 @@
     typedef Vector<Type*> TypeList;
 
     status_t addInternal(const void* data, size_t size, const void* idmapData, size_t idmapDataSize,
-            const int32_t cookie, bool copyData);
+            bool appAsLib, const int32_t cookie, bool copyData);
 
     ssize_t getResourcePackageIndex(uint32_t resID) const;
 
@@ -1871,7 +1873,7 @@
             size_t nameLen, uint32_t* outTypeSpecFlags) const;
 
     status_t parsePackage(
-        const ResTable_package* const pkg, const Header* const header);
+        const ResTable_package* const pkg, const Header* const header, bool appAsLib);
 
     void print_value(const Package* pkg, const Res_value& value) const;