Hidlize IBase; use IBase instead of IBinder.

* IBase is hidlized over hwbinder. GenericBinder
  is removed and Interface with name
  android.hidl.base@1.0::IBase is used instead.

* Removed AST::mImportedNamesForJava, because in Java,
  we always refer to a type with the full name. We don't
  import anything in the java file.

* IFoo.h now includes HidlSupport.h instead of
  HidlTransportSupport.h

Test: hidl_test
Test: hidl_test_java

Fix: 32756130
Fix: 33273293

Change-Id: I435ad7c68dea028a16252148b6f5778e3610b7cd
diff --git a/Interface.h b/Interface.h
index 5da326c..02b04dc 100644
--- a/Interface.h
+++ b/Interface.h
@@ -34,6 +34,7 @@
     bool isInterface() const override;
     bool isBinder() const override;
     bool isRootType() const { return mSuperType == nullptr; }
+    bool isIBase() const { return fqName() == gIBaseFqName; }
 
     const Interface *superType() const;