Merge "Assert the errors size to 1 for case SetDisplayBrightness" into main

        writer.setDisplayBrightness(getPrimaryDisplayId(), /*brightness*/ 0.5f, -1.f);

        execute();

        const auto errors = mReader.takeErrors();

        EXPECT_EQ(1, errors.size());

        ASSERT_EQ(1, errors.size());

        EXPECT_EQ(IComposerClient::EX_UNSUPPORTED, errors[0].errorCode);

        GTEST_SUCCEED() << "SetDisplayBrightness is not supported";

        return;