av: Fix volume count sent to HAL

Use audio_channel_count_from_out_mask to properly calculate the
channel count from the mask, so a valid volume array can be
sent to audio hal.

Test: play a clip check volume array sent to hal
Bug: 326853618
(cherry picked from https://android-review.googlesource.com/q/commit:f4fc9eefcbf2b7fc9758686f12e3417edafbe368)
Merged-In: I59b815f8f4eb16b4aeb2941330b023320adf95e2
Change-Id: I59b815f8f4eb16b4aeb2941330b023320adf95e2
diff --git a/media/libaudiohal/impl/StreamHalAidl.cpp b/media/libaudiohal/impl/StreamHalAidl.cpp
index 09df8d6..2812652 100644
--- a/media/libaudiohal/impl/StreamHalAidl.cpp
+++ b/media/libaudiohal/impl/StreamHalAidl.cpp
@@ -616,7 +616,7 @@
 status_t StreamOutHalAidl::setVolume(float left, float right) {
     TIME_CHECK();
     if (!mStream) return NO_INIT;
-    size_t channelCount = audio_channel_out_mask_from_count(mConfig.channel_mask);
+    size_t channelCount = audio_channel_count_from_out_mask(mConfig.channel_mask);
     if (channelCount == 0) channelCount = 2;
     std::vector<float> volumes(channelCount);
     if (channelCount == 1) {