Snap for 9018797 from 6bda925a to tm-qpr1-release

    CHECK(format->findInt32("channel-count", &numChannels));

    // channel mask info as read from the audio format

    int32_t channelMaskFromFormat;

    int32_t mediaFormatChannelMask;

    // channel mask to use for native playback

    audio_channel_mask_t channelMask;

    if (format->findInt32("channel-mask", &channelMaskFromFormat)) {

    if (format->findInt32("channel-mask", &mediaFormatChannelMask)) {

        // KEY_CHANNEL_MASK follows the android.media.AudioFormat java mask

        // which is left-bitshifted by 2 relative to the native mask

        if ((channelMaskFromFormat & 0b11) != 0) {

            // received an unexpected mask (supposed to follow AudioFormat constants

            // for output masks with the 2 least-significant bits at 0), but

            // it may come from an extractor that uses native masks: keeping

            // the mask as given is ok as it contains at least mono or stereo

            // and potentially the haptic channels

            channelMask = static_cast<audio_channel_mask_t>(channelMaskFromFormat);

        } else {

            channelMask = static_cast<audio_channel_mask_t>(channelMaskFromFormat >> 2);

        }

        channelMask = audio_channel_mask_from_media_format_mask(mediaFormatChannelMask);

    } else {

        // no mask found: the mask will be derived from the channel count

        channelMask = CHANNEL_MASK_USE_CHANNEL_ORDER;