compiler: layout OatMethodQuickCode by profile hotness

Re-arrange all the compiled oat code by using the profile information.
If no profile is available, it retains the original order
(sorted by class_def_idx, method_idx).

Methods are all binned together in a group according to the hotness flags:
 -- not hot at all
 -- all hot
 -- all hot and startup
 -- all hot and post-startup
 -- all hot and startup and poststartup
 -- all startup
 -- all startup and post-startup
 -- all post-startup

(See MethodHotness enum definition for up-to-date binning order.)

Methods within a bin also retain the original order. A deduped method
will appear in the bin of the smallest (class_def_idx, method_idx).

Saves 700KB of memory (PSS) for system_server on most devices.

Bug: 64577026
Test: art/test.py  # no regressions
Test: art/testrunner/testrunner.py -t 661-oat-writer-layout  # new test
Change-Id: I40e9907d095b4a3b48bff0df8799954ef135fc19
diff --git a/test/Android.bp b/test/Android.bp
index d56c0b5..38d0651 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -420,7 +420,8 @@
         "642-fp-callees/fp_callees.cc",
         "647-jni-get-field-id/get_field_id.cc",
         "656-annotation-lookup-generic-jni/test.cc",
-	"664-aget-verifier/aget-verifier.cc",
+        "661-oat-writer-layout/oat_writer_layout.cc",
+        "664-aget-verifier/aget-verifier.cc",
         "708-jit-cache-churn/jit.cc"
     ],
     shared_libs: [