audio: always reset out written regardless of offload_state

Pcm offload use case relies on written count to return render position.
For pcm offload looping playback, if out written is not reset during
out_flush, the 2nd playback will get a wrong render position at the
beginning.

Change-Id: I61f5369458838d14e07aaf14ddb195c4d41d8409
CRs-Fixed: 2107254
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 4b698b8..68dd15f 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -4263,10 +4263,10 @@
         lock_output_stream(out);
         if (out->offload_state == OFFLOAD_STATE_PAUSED) {
             stop_compressed_output_l(out);
-            out->written = 0;
         } else {
             ALOGW("%s called in invalid state %d", __func__, out->offload_state);
         }
+        out->written = 0;
         pthread_mutex_unlock(&out->lock);
         ALOGD("copl(%p):out of compress flush", out);
         return 0;