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/entrypoints/quick/quick_dexcache_entrypoints.cc b/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc
index b12b118..c045e84 100644
--- a/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc
+++ b/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc
@@ -31,7 +31,7 @@
   // A class may be accessing another class' fields when it doesn't have access, as access has been
   // given by inheritance.
   ScopedQuickEntrypointChecks sqec(self);
-  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kRefsOnly);
+  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kSaveRefsOnly);
   return ResolveVerifyAndClinit(type_idx, caller, self, true, false);
 }
 
@@ -39,7 +39,7 @@
     SHARED_REQUIRES(Locks::mutator_lock_) {
   // Called when method->dex_cache_resolved_types_[] misses.
   ScopedQuickEntrypointChecks sqec(self);
-  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kRefsOnly);
+  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kSaveRefsOnly);
   return ResolveVerifyAndClinit(type_idx, caller, self, false, false);
 }
 
@@ -48,14 +48,14 @@
   // Called when caller isn't guaranteed to have access to a type and the dex cache may be
   // unpopulated.
   ScopedQuickEntrypointChecks sqec(self);
-  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kRefsOnly);
+  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kSaveRefsOnly);
   return ResolveVerifyAndClinit(type_idx, caller, self, false, true);
 }
 
 extern "C" mirror::String* artResolveStringFromCode(int32_t string_idx, Thread* self)
     SHARED_REQUIRES(Locks::mutator_lock_) {
   ScopedQuickEntrypointChecks sqec(self);
-  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kRefsOnly);
+  auto* caller = GetCalleeSaveMethodCaller(self, Runtime::kSaveRefsOnly);
   return ResolveStringFromCode(caller, string_idx);
 }