android: fix NDK build — add Opus sources, fix Kotlin composable context, fix bridge db_path param

tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/ChatScreen.kt

@@ -34,10 +34,10 @@ fun ChatScreen(
     var text by remember { mutableStateOf("") }
     val listState = rememberLazyListState()
     val isRecording by viewModel.isRecording.collectAsState()
+    val ctx = LocalContext.current
 
     val filePicker = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
         uri?.let {
-            val ctx = LocalContext.current
             val path = it.path ?: return@let
             viewModel.sendAttachment(path)
         }