ART: Convert pointer size to enum

Move away from size_t to dedicated enum (class).

Bug: 30373134
Bug: 30419309
Test: m test-art-host
Change-Id: Id453c330f1065012e7d4f9fc24ac477cc9bb9269
diff --git a/runtime/utils/dex_cache_arrays_layout.h b/runtime/utils/dex_cache_arrays_layout.h
index cd84460..f2437fa 100644
--- a/runtime/utils/dex_cache_arrays_layout.h
+++ b/runtime/utils/dex_cache_arrays_layout.h
@@ -31,7 +31,7 @@
   // Construct an invalid layout.
   DexCacheArraysLayout()
       : /* types_offset_ is always 0u */
-        pointer_size_(0u),
+        pointer_size_(kRuntimePointerSize),
         methods_offset_(0u),
         strings_offset_(0u),
         fields_offset_(0u),
@@ -39,10 +39,10 @@
   }
 
   // Construct a layout for a particular dex file header.
-  DexCacheArraysLayout(size_t pointer_size, const DexFile::Header& header);
+  DexCacheArraysLayout(PointerSize pointer_size, const DexFile::Header& header);
 
   // Construct a layout for a particular dex file.
-  DexCacheArraysLayout(size_t pointer_size, const DexFile* dex_file);
+  DexCacheArraysLayout(PointerSize pointer_size, const DexFile* dex_file);
 
   bool Valid() const {
     return Size() != 0u;
@@ -96,17 +96,17 @@
 
  private:
   static constexpr size_t types_offset_ = 0u;
-  const size_t pointer_size_;  // Must be first for construction initialization order.
+  const PointerSize pointer_size_;  // Must be first for construction initialization order.
   const size_t methods_offset_;
   const size_t strings_offset_;
   const size_t fields_offset_;
   const size_t size_;
 
-  static size_t Alignment(size_t pointer_size);
+  static size_t Alignment(PointerSize pointer_size);
 
-  static size_t ElementOffset(size_t element_size, uint32_t idx);
+  static size_t ElementOffset(PointerSize element_size, uint32_t idx);
 
-  static size_t ArraySize(size_t element_size, uint32_t num_elements);
+  static size_t ArraySize(PointerSize element_size, uint32_t num_elements);
 };
 
 }  // namespace art