Effect AIDL: support output accumulate

Bug: 327308203
Bug: 327228882
Bug: 329189990
Test: different use cases with Pixel AIDL HAL
Change-Id: I7144442c4b4fe4570561402b90867e886340c764
Merged-In: I7144442c4b4fe4570561402b90867e886340c764
diff --git a/media/libaudiohal/impl/EffectConversionHelperAidl.h b/media/libaudiohal/impl/EffectConversionHelperAidl.h
index 0c0184e..29c5a83 100644
--- a/media/libaudiohal/impl/EffectConversionHelperAidl.h
+++ b/media/libaudiohal/impl/EffectConversionHelperAidl.h
@@ -49,6 +49,8 @@
     ::aidl::android::hardware::audio::effect::Descriptor getDescriptor() const;
     status_t reopen();
 
+    uint8_t mOutputAccessMode = EFFECT_BUFFER_ACCESS_WRITE;
+
   protected:
     const int32_t mSessionId;
     const int32_t mIoId;