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/fault_handler.cc b/runtime/fault_handler.cc
index f86921c..f9345b6 100644
--- a/runtime/fault_handler.cc
+++ b/runtime/fault_handler.cc
@@ -438,7 +438,7 @@
     // above.
     abort();
 #endif
-    self->DumpJavaStack(LOG(ERROR));
+    self->DumpJavaStack(LOG_STREAM(ERROR));
   }
 
   return false;  // Return false since we want to propagate the fault to the main signal handler.