Refactor reflective method invocation.

Move invocation code out of JNI internal into reflection, including ArgArray
code. Make reflective invocation use the ArgArray to build arguments rather
than allocating a jvalue[] and unboxing arguments into that.
Move reflection part of jni_internal_test into reflection_test.
Make greater use of fast JNI.

Change-Id: Ib381372df5f9a83679e30e7275de24fa0e6b1057
diff --git a/runtime/native/dalvik_system_VMRuntime.cc b/runtime/native/dalvik_system_VMRuntime.cc
index 0e2d921..5c5eaa1 100644
--- a/runtime/native/dalvik_system_VMRuntime.cc
+++ b/runtime/native/dalvik_system_VMRuntime.cc
@@ -532,7 +532,7 @@
   NATIVE_METHOD(VMRuntime, concurrentGC, "()V"),
   NATIVE_METHOD(VMRuntime, disableJitCompilation, "()V"),
   NATIVE_METHOD(VMRuntime, getTargetHeapUtilization, "()F"),
-  NATIVE_METHOD(VMRuntime, isDebuggerActive, "()Z"),
+  NATIVE_METHOD(VMRuntime, isDebuggerActive, "!()Z"),
   NATIVE_METHOD(VMRuntime, nativeSetTargetHeapUtilization, "(F)V"),
   NATIVE_METHOD(VMRuntime, newNonMovableArray, "!(Ljava/lang/Class;I)Ljava/lang/Object;"),
   NATIVE_METHOD(VMRuntime, newUnpaddedArray, "!(Ljava/lang/Class;I)Ljava/lang/Object;"),