ART: Add compiled-methods

Add a dex2oat option for compiled-methods, a more granular filter
than compiled-classes. Add compiler-driver support for it.

Refactor dex2oat to reuse file reading.

Add a test to oat_test.

Change-Id: I78d0d040bce7738b4bb7aabe7768b5788d2587ac
diff --git a/compiler/oat_test.cc b/compiler/oat_test.cc
index 989b04f..925b507 100644
--- a/compiler/oat_test.cc
+++ b/compiler/oat_test.cc
@@ -93,8 +93,8 @@
                                             verification_results_.get(),
                                             method_inliner_map_.get(),
                                             compiler_kind, insn_set,
-                                            insn_features.get(), false, nullptr, nullptr, 2, true,
-                                            true, "", timer_.get(), -1, ""));
+                                            insn_features.get(), false, nullptr, nullptr, nullptr,
+                                            2, true, true, "", timer_.get(), -1, ""));
   jobject class_loader = nullptr;
   if (kCompile) {
     TimingLogger timings2("OatTest::WriteRead", false, false);