ART: Use libbase logging

Move most of our logging infrastructure over to system/core/base.
Retain VLOG.

Using unified Android infrastructure has two main advantages. First,
it reduces the complexity/maintenance burden in ART. Second, it
allows to detach logging for the cases where we do not want or need
a runtime, e.g., dexdump, the disassembler, etc. As a part of the
latter, libbase is also supported for all hosts (including Windows).

From a developer viewpoint, there are minor behavior changes for the
LOG statements (see above), but otherwise usage is the same. Explicit
severity enum items are in the android::base namespace now.

Bug: 31338270
Test: m test-art-host
Change-Id: I5abcb2f45f5b03d49951874c48544f72a283a91b
diff --git a/runtime/interpreter/mterp/mterp.cc b/runtime/interpreter/mterp/mterp.cc
index a8c7d15..cf8d4bd 100644
--- a/runtime/interpreter/mterp/mterp.cc
+++ b/runtime/interpreter/mterp/mterp.cc
@@ -38,8 +38,8 @@
   int interp_size = (uintptr_t) artMterpAsmInstructionEnd -
                     (uintptr_t) artMterpAsmInstructionStart;
   if ((interp_size == 0) || (interp_size != (art::kNumPackedOpcodes * width))) {
-      LOG(art::FATAL) << "ERROR: unexpected asm interp size " << interp_size
-                      << "(did an instruction handler exceed " << width << " bytes?)";
+      LOG(FATAL) << "ERROR: unexpected asm interp size " << interp_size
+                 << "(did an instruction handler exceed " << width << " bytes?)";
   }
 }
 
diff --git a/runtime/interpreter/unstarted_runtime.cc b/runtime/interpreter/unstarted_runtime.cc
index d505aea..98e358b 100644
--- a/runtime/interpreter/unstarted_runtime.cc
+++ b/runtime/interpreter/unstarted_runtime.cc
@@ -858,7 +858,7 @@
       ArtMethod* init_method = h_real_to_string_class->FindDirectMethod(
           "<init>", "()V", cl->GetImagePointerSize());
       if (init_method == nullptr) {
-        h_real_to_string_class->DumpClass(LOG(FATAL), mirror::Class::kDumpClassFullDetail);
+        h_real_to_string_class->DumpClass(LOG_STREAM(FATAL), mirror::Class::kDumpClassFullDetail);
       } else {
         JValue invoke_result;
         EnterInterpreterFromInvoke(self, init_method, h_real_to_string_obj.Get(), nullptr,