Directory restructuring of object.h

Break object.h into constituent files.
Reduce number of #includes in other GC header files.
Introduce -inl.h files to avoid mirror files #include-ing each other.
Check invariants of verifier RegTypes for all constructors.

Change-Id: Iecf1171c02910ac152d52947330ef456df4043bc
diff --git a/src/oat/jni/jni_compiler.cc b/src/oat/jni/jni_compiler.cc
index ac35143..c0298de 100644
--- a/src/oat/jni/jni_compiler.cc
+++ b/src/oat/jni/jni_compiler.cc
@@ -118,7 +118,7 @@
     // Check sirt offset is within frame
     CHECK_LT(sirt_offset.Uint32Value(), frame_size);
     __ LoadRef(main_jni_conv->InterproceduralScratchRegister(),
-               mr_conv->MethodRegister(), AbstractMethod::DeclaringClassOffset());
+               mr_conv->MethodRegister(), mirror::AbstractMethod::DeclaringClassOffset());
     __ VerifyObject(main_jni_conv->InterproceduralScratchRegister(), false);
     __ StoreRef(sirt_offset, main_jni_conv->InterproceduralScratchRegister());
     main_jni_conv->Next();  // in SIRT so move to next argument
@@ -269,7 +269,7 @@
   }
 
   // 9. Plant call to native code associated with method.
-  __ Call(main_jni_conv->MethodStackOffset(), AbstractMethod::NativeMethodOffset(),
+  __ Call(main_jni_conv->MethodStackOffset(), mirror::AbstractMethod::NativeMethodOffset(),
           mr_conv->InterproceduralScratchRegister());
 
   // 10. Fix differences in result widths.