Style cleanup for ObjPtr<>-ify changes.

Replace "ObjPtr<.> const" with "const ObjPtr<.>".

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 31113334
Change-Id: I5a1c080bc88b091e15ee9eb0bb1ef6f6f290701c
diff --git a/runtime/class_loader_context.cc b/runtime/class_loader_context.cc
index e811afd..e890c1f 100644
--- a/runtime/class_loader_context.cc
+++ b/runtime/class_loader_context.cc
@@ -956,9 +956,9 @@
       jni::DecodeArtField(WellKnownClasses::dalvik_system_DexFile_cookie);
   ArtField* const dex_file_field =
       jni::DecodeArtField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
-  ObjPtr<mirror::Class> const element_class = soa.Decode<mirror::Class>(
+  const ObjPtr<mirror::Class> element_class = soa.Decode<mirror::Class>(
       WellKnownClasses::dalvik_system_DexPathList__Element);
-  ObjPtr<mirror::Class> const dexfile_class = soa.Decode<mirror::Class>(
+  const ObjPtr<mirror::Class> dexfile_class = soa.Decode<mirror::Class>(
       WellKnownClasses::dalvik_system_DexFile);
 
   for (int32_t i = 0; i < dex_elements->GetLength(); ++i) {