ART: Add -verbose:dex

Add a dex verbose flag to separate out concerns for dex investigations.

Bug: 37158297
Test: m test-art-host
Change-Id: Ice5efad919ae0b6838d44e2f3711563a0774ef0e
diff --git a/cmdline/cmdline_parser_test.cc b/cmdline/cmdline_parser_test.cc
index 5b331bc..1a2b9cd 100644
--- a/cmdline/cmdline_parser_test.cc
+++ b/cmdline/cmdline_parser_test.cc
@@ -300,6 +300,13 @@
     log_verbosity.oat = true;
     EXPECT_SINGLE_PARSE_VALUE(log_verbosity, log_args, M::Verbose);
   }
+
+  {
+    const char* log_args = "-verbose:dex";
+    LogVerbosity log_verbosity = LogVerbosity();
+    log_verbosity.dex = true;
+    EXPECT_SINGLE_PARSE_VALUE(log_verbosity, log_args, M::Verbose);
+  }
 }  // TEST_F
 
 // TODO: Enable this b/19274810