AAPT2: Move all file output to FileOutputStream

FileOutputStream is safe to use on Windows, as it opens
files using our compatibility API.

Bug: 68262818
Test: make aapt2_tests
Change-Id: Ib0b27e93edd609b49b1327db7d9867a002198ebb
diff --git a/tools/aapt2/java/ManifestClassGenerator.h b/tools/aapt2/java/ManifestClassGenerator.h
index b12202a..3f6645f 100644
--- a/tools/aapt2/java/ManifestClassGenerator.h
+++ b/tools/aapt2/java/ManifestClassGenerator.h
@@ -23,8 +23,7 @@
 
 namespace aapt {
 
-std::unique_ptr<ClassDefinition> GenerateManifestClass(IDiagnostics* diag,
-                                                       xml::XmlResource* res);
+std::unique_ptr<ClassDefinition> GenerateManifestClass(IDiagnostics* diag, xml::XmlResource* res);
 
 }  // namespace aapt