Revert "Use app scoped CoroutineScope (#3403)"

This reverts commit 509eee5dfb.

Fixes #3429

app/src/main/java/eu/kanade/tachiyomi/extension/ExtensionManager.kt

@@ -14,6 +14,7 @@ import eu.kanade.tachiyomi.extension.util.ExtensionInstaller
 import eu.kanade.tachiyomi.extension.util.ExtensionLoader
 import eu.kanade.tachiyomi.util.system.toast
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
@@ -40,10 +41,12 @@ import java.util.Locale
  */
 class ExtensionManager(
     private val context: Context,
-    private val scope: CoroutineScope,
     private val preferences: SourcePreferences = Injekt.get(),
     private val trustExtension: TrustExtension = Injekt.get(),
 ) {
+
+    val scope = CoroutineScope(SupervisorJob())
+
     private val _isInitialized = MutableStateFlow(false)
     val isInitialized: StateFlow<Boolean> = _isInitialized.asStateFlow()
 
@@ -55,7 +58,7 @@ class ExtensionManager(
     /**
      * The installer which installs, updates and uninstalls the extensions.
      */
-    private val installer by lazy { ExtensionInstaller(context, scope) }
+    private val installer by lazy { ExtensionInstaller(context) }
 
     private val iconMap = mutableMapOf<String, Drawable>()