Keep the stroke import used by radio controls

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

@@ -27,6 +27,7 @@ import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.drawscope.Stroke
 import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.layout.positionInWindow
 import androidx.compose.ui.platform.LocalDensity