review: keep STARTED gate on delayed connecting animation

Plain lifecycleScope.launch (replacing launchWhenStarted) could run the delayed
progress show() while the activity is stopped. Gate the UI mutation with withStarted to
preserve the lifecycle-aware behavior (matches StatsBar).

Author: hawkff

app/src/main/java/io/nekohasekai/sagernet/widget/ServiceButton.kt

@@ -12,6 +12,7 @@ import androidx.appcompat.widget.TooltipCompat
 import androidx.dynamicanimation.animation.DynamicAnimation
 import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.withStarted
 import androidx.vectordrawable.graphics.drawable.Animatable2Compat
 import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat
 import com.google.android.material.floatingactionbutton.FloatingActionButton
@@ -67,8 +68,12 @@ class ServiceButton @JvmOverloads constructor(
             hideProgress()
             delayedAnimation = (context as LifecycleOwner).lifecycleScope.launch {
                 delay(context.resources.getInteger(android.R.integer.config_mediumAnimTime) + 1000L)
-                isIndeterminate = true
-                show()
+                // Gate the UI mutation on STARTED so a delayed progress reveal doesn't run
+                // while the activity is stopped (the old launchWhenStarted suspended here).
+                (context as LifecycleOwner).withStarted {
+                    isIndeterminate = true
+                    show()
+                }
             }
         }
     }