Point ResXMLTree to a copy of the asset buffer in AssetManager::getPk…

…gName()

This ensures that there is no dangling pointer when the asset is closed.
Without this fix, a device ends up in a boot loop when an app is
installed that was created using aapt2.

Reference:
TwidereProject/Twidere-Android#963 (comment)
Signed-off-by: Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de>

https://git.replicant.us/replicant/frameworks_base/commit/?id=953d2a3493aaceb3209afc7eef1ff1e7f7242908

libs/androidfw/AssetManager.cpp

@@ -421,7 +421,7 @@ String8 AssetManager::getPkgName(const char *apkPath) {
 
         Asset* manifestAsset = openNonAssetInPathLocked(kAndroidManifest, Asset::ACCESS_BUFFER, ap);
         tree.setTo(manifestAsset->getBuffer(true),
-                       manifestAsset->getLength());
+                       manifestAsset->getLength(), true);
         tree.restart();
 
         size_t len;