Rename callee save enumerators.

And related image method enumerators, macros, etc.
Clean up some entrypoint assembly comments.

This is a follow-up to
    https://android-review.googlesource.com/252348

Test: Run ART test suite on host and Nexus 9.
Bug: 30212852
Change-Id: I2707342d4255c88c547655be83ed97a67e12ae9e
diff --git a/runtime/stack.cc b/runtime/stack.cc
index dc5cada..ababf78 100644
--- a/runtime/stack.cc
+++ b/runtime/stack.cc
@@ -729,7 +729,7 @@
   Runtime* runtime = Runtime::Current();
 
   if (method->IsAbstract()) {
-    return runtime->GetCalleeSaveMethodFrameInfo(Runtime::kRefsAndArgs);
+    return runtime->GetCalleeSaveMethodFrameInfo(Runtime::kSaveRefsAndArgs);
   }
 
   // This goes before IsProxyMethod since runtime methods have a null declaring class.
@@ -743,7 +743,7 @@
     // compiled method without any stubs. Therefore the method must have a OatQuickMethodHeader.
     DCHECK(!method->IsDirect() && !method->IsConstructor())
         << "Constructors of proxy classes must have a OatQuickMethodHeader";
-    return runtime->GetCalleeSaveMethodFrameInfo(Runtime::kRefsAndArgs);
+    return runtime->GetCalleeSaveMethodFrameInfo(Runtime::kSaveRefsAndArgs);
   }
 
   // The only remaining case is if the method is native and uses the generic JNI stub.
@@ -755,7 +755,8 @@
   // Generic JNI frame.
   uint32_t handle_refs = GetNumberOfReferenceArgsWithoutReceiver(method) + 1;
   size_t scope_size = HandleScope::SizeOf(handle_refs);
-  QuickMethodFrameInfo callee_info = runtime->GetCalleeSaveMethodFrameInfo(Runtime::kRefsAndArgs);
+  QuickMethodFrameInfo callee_info =
+      runtime->GetCalleeSaveMethodFrameInfo(Runtime::kSaveRefsAndArgs);
 
   // Callee saves + handle scope + method ref + alignment
   // Note: -sizeof(void*) since callee-save frame stores a whole method pointer.
@@ -833,10 +834,12 @@
             const instrumentation::InstrumentationStackFrame& instrumentation_frame =
                 GetInstrumentationStackFrame(thread_, instrumentation_stack_depth);
             instrumentation_stack_depth++;
-            if (GetMethod() == Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAll)) {
+            if (GetMethod() ==
+                Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveAllCalleeSaves)) {
               // Skip runtime save all callee frames which are used to deliver exceptions.
             } else if (instrumentation_frame.interpreter_entry_) {
-              ArtMethod* callee = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs);
+              ArtMethod* callee =
+                  Runtime::Current()->GetCalleeSaveMethod(Runtime::kSaveRefsAndArgs);
               CHECK_EQ(GetMethod(), callee) << "Expected: " << PrettyMethod(callee) << " Found: "
                                             << PrettyMethod(GetMethod());
             } else {