audio: fix output flag test in open_output_stream

If flag AUDIO_OUTPUT_FLAG_DIRECT is set, we should only
try to open a multi channel HDMI PCM output if flag
AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD is not set.

Bug: 8174410.
Change-Id: I63fe6cabca590e70c077dea13c86c6948700e606
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index c89d88e..0786b3f 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -1772,6 +1772,7 @@
 
     /* Init use case and pcm_config */
     if (out->flags & AUDIO_OUTPUT_FLAG_DIRECT &&
+            !(out->flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) &&
         out->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) {
         pthread_mutex_lock(&adev->lock);
         ret = read_hdmi_channel_masks(out);