IHidlInterfaceBase is the base class for all interfaces.

IHidlInterfaceBase::descriptor is the descriptor for
HIDL reserved methods.

Test: hidl_test

Bug: 32337854

Change-Id: Ibdeb6f64e779315b9fcdb807b0fbec885471e333
diff --git a/HidlSupport.cpp b/HidlSupport.cpp
index c8a2821..666c606 100644
--- a/HidlSupport.cpp
+++ b/HidlSupport.cpp
@@ -166,6 +166,8 @@
 // static
 const size_t hidl_string::kOffsetOfBuffer = offsetof(hidl_string, mBuffer);
 
+const ::android::String16 IHidlInterfaceBase::descriptor(
+        "android.hardware@0.0::IHidlInterfaceBase");
 
 // ----------------------------------------------------------------------
 // HidlInstrumentor implementation.