RRO: reintroduce lost ResTable insert of assets

With the recent introduction of AssetManager::appendPathToResTable,
overlay packages were not properly added to the AssetManager, and once
added, were not properly inserted into the ResTable.

Bug: 17765434
Change-Id: Ie21f227c654c98730f74a687d0e16ee2b80e747e

core/java/android/content/res/AssetManager.java

@@ -627,7 +627,21 @@ public final class AssetManager implements AutoCloseable {
      *
      * {@hide}
      */
-    public native final int addOverlayPath(String idmapPath);
+
+    public final int addOverlayPath(String idmapPath) {
+        synchronized (this) {
+            int res = addOverlayPathNative(idmapPath);
+            makeStringBlocks(mStringBlocks);
+            return res;
+        }
+    }
+
+    /**
+     * See addOverlayPath.
+     *
+     * {@hide}
+     */
+    public native final int addOverlayPathNative(String idmapPath);
 
     /**
      * Add multiple sets of assets to the asset manager at once.  See

core/jni/android_util_AssetManager.cpp

@@ -2001,7 +2001,7 @@ static JNINativeMethod gAssetManagerMethods[] = {
         (void*) android_content_AssetManager_getAssetRemainingLength },
     { "addAssetPathNative", "(Ljava/lang/String;)I",
         (void*) android_content_AssetManager_addAssetPath },
-    { "addOverlayPath",   "(Ljava/lang/String;)I",
+    { "addOverlayPathNative",   "(Ljava/lang/String;)I",
         (void*) android_content_AssetManager_addOverlayPath },
     { "isUpToDate",     "()Z",
         (void*) android_content_AssetManager_isUpToDate },

libs/androidfw/AssetManager.cpp

@@ -296,6 +296,10 @@ bool AssetManager::addOverlayPath(const String8& packagePath, int32_t* cookie)
     mAssetPaths.add(oap);
     *cookie = static_cast<int32_t>(mAssetPaths.size());
 
+    if (mResources != NULL) {
+        appendPathToResTable(oap);
+    }
+
     return true;
  }