VTS Audio Effect: Do not check the result of IEffect::offload method

HAL may not support offloading, and a call to IEffect::offload
is allowed to return an error code.

Update the test to only check that the call to the method doesn't
crash.

Bug: 38437110
Test: still passes
Change-Id: I6cfd25998edb9c68d2e585e572ba8ba3a3427e98
diff --git a/audio/effect/2.0/vts/functional/VtsHalAudioEffectV2_0TargetTest.cpp b/audio/effect/2.0/vts/functional/VtsHalAudioEffectV2_0TargetTest.cpp
index 940bb4e..f069c46 100644
--- a/audio/effect/2.0/vts/functional/VtsHalAudioEffectV2_0TargetTest.cpp
+++ b/audio/effect/2.0/vts/functional/VtsHalAudioEffectV2_0TargetTest.cpp
@@ -450,16 +450,13 @@
 }
 
 TEST_F(AudioEffectHidlTest, Offload) {
-  description("Verify that calling Offload method either works or returns not supported");
+  description("Verify that calling Offload method does not crash");
   EffectOffloadParameter offloadParam;
   offloadParam.isOffload = false;
   offloadParam.ioHandle =
       static_cast<int>(AudioHandleConsts::AUDIO_IO_HANDLE_NONE);
   Return<Result> ret = effect->offload(offloadParam);
   EXPECT_TRUE(ret.isOk());
-  EXPECT_TRUE(Result::OK == ret || Result::NOT_SUPPORTED == ret)
-          << "Expected OK or NOT_SUPPORTED, actual value: "
-          << static_cast<int32_t>(static_cast<Result>(ret));
 }
 
 TEST_F(AudioEffectHidlTest, PrepareForProcessing) {