Add new APIs for watermarking

Bug: 263762255
Test: m
Change-Id: I7eeaa58f0a3a1056f33e22aba42540636794ade1
diff --git a/tv/input/aidl/vts/functional/VtsHalTvInputTargetTest.cpp b/tv/input/aidl/vts/functional/VtsHalTvInputTargetTest.cpp
index ec83e29..9c26069 100644
--- a/tv/input/aidl/vts/functional/VtsHalTvInputTargetTest.cpp
+++ b/tv/input/aidl/vts/functional/VtsHalTvInputTargetTest.cpp
@@ -43,6 +43,11 @@
     return ::ndk::ScopedAStatus::ok();
 }
 
+::ndk::ScopedAStatus TvInputAidlTest::TvInputCallback::notifyTvMessageEvent(
+        const TvMessageEvent& in_event) {
+    return ::ndk::ScopedAStatus::ok();
+}
+
 void TvInputAidlTest::SetUp() {
     if (AServiceManager_isDeclared(GetParam().c_str())) {
         ::ndk::SpAIBinder binder(AServiceManager_waitForService(GetParam().c_str()));