Revert "ART: Refactor typedef to using"

This reverts commit 9a20ff06f7ccee08a742c315ec6d351ab56ba1cd.

Reason for revert: Attributes on the wrong side.

Bug: 32619234
Change-Id: I8fd2abef619b22c02ccfbf5ae629339f1a60918b
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index d9daae7..befeea4 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -307,7 +307,7 @@
     return lhs.size < rhs.size || (lhs.size == rhs.size && lhs.start_offset > rhs.start_offset);
   }
 };
-using FieldGaps = std::priority_queue<FieldGap, std::vector<FieldGap>, FieldGapsComparator>;
+typedef std::priority_queue<FieldGap, std::vector<FieldGap>, FieldGapsComparator> FieldGaps;
 
 // Adds largest aligned gaps to queue of gaps.
 static void AddFieldGap(uint32_t gap_start, uint32_t gap_end, FieldGaps* gaps) {
@@ -2301,7 +2301,7 @@
   return klass;
 }
 
-using ClassPathEntry = std::pair<const DexFile*, const DexFile::ClassDef*>;
+typedef std::pair<const DexFile*, const DexFile::ClassDef*> ClassPathEntry;
 
 // Search a collection of DexFiles for a descriptor
 ClassPathEntry FindInClassPath(const char* descriptor,