Check createComposer().isOk() in test setup

Bug: b/193240715
Test: cvd start
Test: vts -m VtsHalGraphicsComposer3_TargetTest
Change-Id: I0a2b90bcb403fbf3454046d3e46bf972a4d149f7
diff --git a/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp b/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp
index ff22817..abfcbe4 100644
--- a/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp
+++ b/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp
@@ -76,7 +76,10 @@
         ASSERT_NE(binder, nullptr);
         ASSERT_NO_FATAL_FAILURE(mComposer = IComposer::fromBinder(binder));
         ASSERT_NE(mComposer, nullptr);
-        ASSERT_NO_FATAL_FAILURE(mComposer->createClient(&mComposerClient));
+
+        ndk::ScopedAStatus status;
+        ASSERT_NO_FATAL_FAILURE(status = mComposer->createClient(&mComposerClient));
+        ASSERT_TRUE(status.isOk());
 
         mComposerCallback = ::ndk::SharedRefBase::make<GraphicsComposerCallback>();
         EXPECT_TRUE(mComposerClient->registerCallback(mComposerCallback).isOk());