[audiopolicy] fix -Wreorder-init-list

C++20 will require members in a designated initializer to be in order
unlike C99.

Bug: 139945549
Test: mm
Change-Id: Ie129344a36893adc82e67181012e3af817bda9f4
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 72221a8..3223530 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -1093,8 +1093,9 @@
     }
 
     audio_config_base_t clientConfig = {.sample_rate = config->sample_rate,
+        .channel_mask = config->channel_mask,
         .format = config->format,
-        .channel_mask = config->channel_mask };
+    };
     *portId = PolicyAudioPort::getNextUniqueId();
 
     sp<TrackClientDescriptor> clientDesc =