[HWC3] VTS client updates for onRefreshRateChangedDebug callback
And for setRefreshRateChangedCallbackDebugEnabled

This does not add any implementation for the VTS code.
Implementation will be added with the VTS tests as a followup.

Test: Device boots
BUG: 202734676
Change-Id: If47bbcf87698b346907b3bc1903908ff0a63203f
diff --git a/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp b/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp
index d534943..4fb5d01 100644
--- a/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp
+++ b/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp
@@ -124,6 +124,12 @@
     return ::ndk::ScopedAStatus::ok();
 }
 
+::ndk::ScopedAStatus GraphicsComposerCallback::onRefreshRateChangedDebug(
+        const RefreshRateChangedDebugData&) {
+    // TODO(b/202734676) Add implementation for Vts tests
+    return ::ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
 ::ndk::ScopedAStatus GraphicsComposerCallback::onVsyncPeriodTimingChanged(
         int64_t in_display,
         const ::aidl::android::hardware::graphics::composer3::VsyncPeriodChangeTimeline&