sound trigger VTS: used default HAL service name

Bug: 37864311
Test: run VTS for module VtsHalSoundtriggerV2_0Target on marlin
Change-Id: If727dcc5921742ece6252dff839ce8100f24ccd1
diff --git a/soundtrigger/2.0/vts/functional/VtsHalSoundtriggerV2_0TargetTest.cpp b/soundtrigger/2.0/vts/functional/VtsHalSoundtriggerV2_0TargetTest.cpp
index 2eca8f4..97956c5 100644
--- a/soundtrigger/2.0/vts/functional/VtsHalSoundtriggerV2_0TargetTest.cpp
+++ b/soundtrigger/2.0/vts/functional/VtsHalSoundtriggerV2_0TargetTest.cpp
@@ -89,10 +89,11 @@
 class SoundTriggerHidlTest : public ::testing::VtsHalHidlTargetTestBase {
  public:
   virtual void SetUp() override {
-    mSoundTriggerHal = ::testing::VtsHalHidlTargetTestBase::getService<ISoundTriggerHw>("sound_trigger.primary");
-    ASSERT_NE(nullptr, mSoundTriggerHal.get());
-    mCallback = new SoundTriggerHwCallback(*this);
-    ASSERT_NE(nullptr, mCallback.get());
+      mSoundTriggerHal =
+          ::testing::VtsHalHidlTargetTestBase::getService<ISoundTriggerHw>();
+      ASSERT_NE(nullptr, mSoundTriggerHal.get());
+      mCallback = new SoundTriggerHwCallback(*this);
+      ASSERT_NE(nullptr, mCallback.get());
   }
 
   static void SetUpTestCase() {