Remove mirror:: and ArtMethod deps in utils.{h,cc}

The latest chapter in the ongoing saga of attempting to dump a DEX
file without having to start a whole runtime instance.  This episode
finds us removing references to ArtMethod/ArtField/mirror.

One aspect of this change that I would like to call out specfically
is that the utils versions of the "Pretty*" functions all were written
to accept nullptr as an argument.  I have split these functions up as
follows:
1) an instance method, such as PrettyClass that obviously requires
this != nullptr.
2) a static method, that behaves the same way as the util method, but
calls the instance method if p != nullptr.
This requires using a full class qualifier for the static methods,
which isn't exactly beautiful.  I have tried to remove as many cases
as possible where it was clear p != nullptr.

Bug: 22322814
Test: test-art-host
Change-Id: I21adee3614aa697aa580cd1b86b72d9206e1cb24
diff --git a/runtime/interpreter/interpreter.cc b/runtime/interpreter/interpreter.cc
index f3cd25c..2e00770 100644
--- a/runtime/interpreter/interpreter.cc
+++ b/runtime/interpreter/interpreter.cc
@@ -178,7 +178,7 @@
       ScopedThreadStateChange tsc(self, kNative);
       fn(soa.Env(), klass.get(), arg0.get(), args[1], arg2.get(), args[3], args[4]);
     } else {
-      LOG(FATAL) << "Do something with static native method: " << PrettyMethod(method)
+      LOG(FATAL) << "Do something with static native method: " << method->PrettyMethod()
           << " shorty: " << shorty;
     }
   } else {
@@ -223,7 +223,7 @@
       ScopedThreadStateChange tsc(self, kNative);
       result->SetI(fn(soa.Env(), rcvr.get(), args[0], args[1]));
     } else {
-      LOG(FATAL) << "Do something with native method: " << PrettyMethod(method)
+      LOG(FATAL) << "Do something with native method: " << method->PrettyMethod()
           << " shorty: " << shorty;
     }
   }
@@ -546,7 +546,7 @@
       } else {
         CHECK(false) << "Unexpected instruction opcode " << instr->Opcode()
                      << " at dex_pc " << dex_pc
-                     << " of method: " << PrettyMethod(shadow_frame->GetMethod(), false);
+                     << " of method: " << ArtMethod::PrettyMethod(shadow_frame->GetMethod(), false);
       }
     } else {
       // Nothing to do, the dex_pc is the one at which the code requested