AAPT2: Set the minSdkVersion when generating multiple APKs.

When generating multiple APKs from a configuration file, check to see if
we have filtered resource by minSdkVersion and update the manifest to
reflect this. We only want to inflate and modify the manifest file if
there is an update to be applied.

Bug: 37944703
Bug: 67005138

Test: Ran unit tests
Test: Manually split an APK and verified the manifest by dumping with
      AAPT (both xmltree and badging).

Change-Id: I64a0e4889d7d9e57373369b044a091287b06cc35
diff --git a/tools/aapt2/cmd/Optimize.cpp b/tools/aapt2/cmd/Optimize.cpp
index 704faee..56b61d0 100644
--- a/tools/aapt2/cmd/Optimize.cpp
+++ b/tools/aapt2/cmd/Optimize.cpp
@@ -283,24 +283,8 @@
 
 bool ExtractAppDataFromManifest(OptimizeContext* context, LoadedApk* apk,
                                 OptimizeOptions* out_options) {
-  io::IFile* manifest_file = apk->GetFileCollection()->FindFile("AndroidManifest.xml");
-  if (manifest_file == nullptr) {
-    context->GetDiagnostics()->Error(DiagMessage(apk->GetSource())
-                                     << "missing AndroidManifest.xml");
-    return false;
-  }
-
-  std::unique_ptr<io::IData> data = manifest_file->OpenAsData();
-  if (data == nullptr) {
-    context->GetDiagnostics()->Error(DiagMessage(manifest_file->GetSource())
-                                     << "failed to open file");
-    return false;
-  }
-
-  std::unique_ptr<xml::XmlResource> manifest = xml::Inflate(
-      data->data(), data->size(), context->GetDiagnostics(), manifest_file->GetSource());
+  std::unique_ptr<xml::XmlResource> manifest = apk->InflateManifest(context);
   if (manifest == nullptr) {
-    context->GetDiagnostics()->Error(DiagMessage() << "failed to read binary AndroidManifest.xml");
     return false;
   }