Optimizing: Tag Arena allocations with their source.

This adds the ability to track where we allocate memory
when the kArenaAllocatorCountAllocations flag is turned on.

Also move some allocations from native heap to the Arena
and remove some unnecessary utilities.

Bug: 23736311
Change-Id: I1aaef3fd405d1de444fe9e618b1ce7ecef07ade3
diff --git a/compiler/dex/quick/codegen_util.cc b/compiler/dex/quick/codegen_util.cc
index 72754ae..7082bed 100644
--- a/compiler/dex/quick/codegen_util.cc
+++ b/compiler/dex/quick/codegen_util.cc
@@ -1115,7 +1115,7 @@
 
 CompiledMethod* Mir2Lir::GetCompiledMethod() {
   // Combine vmap tables - core regs, then fp regs - into vmap_table.
-  Leb128EncodingVector vmap_encoder;
+  Leb128EncodingVector<> vmap_encoder;
   if (frame_size_ > 0) {
     // Prefix the encoded data with its size.
     size_t size = core_vmap_table_.size() + 1 /* marker */ + fp_vmap_table_.size();