[android] Refine SbMediaGetAudioConfiguration() (#3900)

Log an error message when there is no audio connector for a certain
index, and no longer calling GetMediaAudioConnectorName() in such case,
to avoid triggering SB_NOTREACHED() in GetMediaAudioConnectorName() with
an invalid audio connector.

b/276483058

Change-Id: Ic713f75c114b8e27bc245e63194600880cd38804

starboard/android/shared/media_get_audio_configuration.cc

@@ -40,13 +40,16 @@ bool SbMediaGetAudioConfiguration(
     return false;
   }
 
-  bool result = MediaCapabilitiesCache::GetInstance()->GetAudioConfiguration(
-      output_index, out_configuration);
-
-  SB_LOG(INFO) << "Audio connector type for index " << output_index << " is "
-               << GetMediaAudioConnectorName(out_configuration->connector)
-               << " and it has " << out_configuration->number_of_channels
-               << " channels.";
+  if (MediaCapabilitiesCache::GetInstance()->GetAudioConfiguration(
+          output_index, out_configuration)) {
+    SB_LOG(INFO) << "Audio connector type for index " << output_index << " is "
+                 << GetMediaAudioConnectorName(out_configuration->connector)
+                 << " and it has " << out_configuration->number_of_channels
+                 << " channels.";
+    return true;
+  }
 
-  return result;
+  SB_LOG(INFO) << "Failed to find audio connector type for index "
+               << output_index;
+  return false;
 }