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/gc/space/image_space.cc b/runtime/gc/space/image_space.cc
index 8ade185..c2e2a1e 100644
--- a/runtime/gc/space/image_space.cc
+++ b/runtime/gc/space/image_space.cc
@@ -1430,12 +1430,12 @@
              image_header->GetImageMethod(ImageHeader::kImtConflictMethod));
     CHECK_EQ(runtime->GetImtUnimplementedMethod(),
              image_header->GetImageMethod(ImageHeader::kImtUnimplementedMethod));
-    CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kSaveAll),
-             image_header->GetImageMethod(ImageHeader::kCalleeSaveMethod));
-    CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kRefsOnly),
-             image_header->GetImageMethod(ImageHeader::kRefsOnlySaveMethod));
-    CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kRefsAndArgs),
-             image_header->GetImageMethod(ImageHeader::kRefsAndArgsSaveMethod));
+    CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kSaveAllCalleeSaves),
+             image_header->GetImageMethod(ImageHeader::kSaveAllCalleeSavesMethod));
+    CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kSaveRefsOnly),
+             image_header->GetImageMethod(ImageHeader::kSaveRefsOnlyMethod));
+    CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kSaveRefsAndArgs),
+             image_header->GetImageMethod(ImageHeader::kSaveRefsAndArgsMethod));
     CHECK_EQ(runtime->GetCalleeSaveMethod(Runtime::kSaveEverything),
              image_header->GetImageMethod(ImageHeader::kSaveEverythingMethod));
   } else if (!runtime->HasResolutionMethod()) {
@@ -1445,11 +1445,13 @@
     runtime->SetImtUnimplementedMethod(
         image_header->GetImageMethod(ImageHeader::kImtUnimplementedMethod));
     runtime->SetCalleeSaveMethod(
-        image_header->GetImageMethod(ImageHeader::kCalleeSaveMethod), Runtime::kSaveAll);
+        image_header->GetImageMethod(ImageHeader::kSaveAllCalleeSavesMethod),
+        Runtime::kSaveAllCalleeSaves);
     runtime->SetCalleeSaveMethod(
-        image_header->GetImageMethod(ImageHeader::kRefsOnlySaveMethod), Runtime::kRefsOnly);
+        image_header->GetImageMethod(ImageHeader::kSaveRefsOnlyMethod), Runtime::kSaveRefsOnly);
     runtime->SetCalleeSaveMethod(
-        image_header->GetImageMethod(ImageHeader::kRefsAndArgsSaveMethod), Runtime::kRefsAndArgs);
+        image_header->GetImageMethod(ImageHeader::kSaveRefsAndArgsMethod),
+        Runtime::kSaveRefsAndArgs);
     runtime->SetCalleeSaveMethod(
         image_header->GetImageMethod(ImageHeader::kSaveEverythingMethod), Runtime::kSaveEverything);
   }