Misc Service cleanup (#9005)

* Simplify DownloadService wake lock handling

_isRunning is only modified in onCreate/onDestroy, so the listener
job is redundant.

* Drop superclass calls to Service.onCreate/onDestroy

From https://developer.android.com/guide/components/services
> Note: Unlike the activity lifecycle callback methods, you are not
> required to call the superclass implementation of these callback
> methods.

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreService.kt

@@ -74,8 +74,6 @@ class BackupRestoreService : Service() {
     private lateinit var notifier: BackupNotifier
 
     override fun onCreate() {
-        super.onCreate()
-
         scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
         notifier = BackupNotifier(this)
         wakeLock = acquireWakeLock(javaClass.name)
@@ -90,7 +88,6 @@ class BackupRestoreService : Service() {
 
     override fun onDestroy() {
         destroyJob()
-        super.onDestroy()
     }
 
     private fun destroyJob() {

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadService.kt

@@ -85,21 +85,20 @@ class DownloadService : Service() {
     private lateinit var scope: CoroutineScope
 
     override fun onCreate() {
-        super.onCreate()
         scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
         startForeground(Notifications.ID_DOWNLOAD_CHAPTER_PROGRESS, getPlaceholderNotification())
         wakeLock = acquireWakeLock(javaClass.name)
         _isRunning.value = true
-        listenDownloaderState()
         listenNetworkChanges()
     }
 
     override fun onDestroy() {
-        scope?.cancel()
+        scope.cancel()
         _isRunning.value = false
         downloadManager.stopDownloads()
-        wakeLock.releaseIfHeld()
-        super.onDestroy()
+        if (wakeLock.isHeld) {
+            wakeLock.release()
+        }
     }
 
     // Not used
@@ -143,32 +142,6 @@ class DownloadService : Service() {
             .launchIn(scope)
     }
 
-    /**
-     * Listens to downloader status. Enables or disables the wake lock depending on the status.
-     */
-    private fun listenDownloaderState() {
-        _isRunning
-            .onEach { isRunning ->
-                if (isRunning) {
-                    wakeLock.acquireIfNotHeld()
-                } else {
-                    wakeLock.releaseIfHeld()
-                }
-            }
-            .catch {
-                // Ignore errors
-            }
-            .launchIn(scope)
-    }
-
-    private fun PowerManager.WakeLock.releaseIfHeld() {
-        if (isHeld) release()
-    }
-
-    private fun PowerManager.WakeLock.acquireIfNotHeld() {
-        if (!isHeld) acquire()
-    }
-
     private fun getPlaceholderNotification(): Notification {
         return notification(Notifications.CHANNEL_DOWNLOADER_PROGRESS) {
             setContentTitle(getString(R.string.download_notifier_downloader_title))

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -177,8 +177,6 @@ class LibraryUpdateService(
      * the wake lock.
      */
     override fun onCreate() {
-        super.onCreate()
-
         notifier = LibraryUpdateNotifier(this)
         wakeLock = acquireWakeLock(javaClass.name)
 
@@ -198,7 +196,6 @@ class LibraryUpdateService(
         if (instance == this) {
             instance = null
         }
-        super.onDestroy()
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateService.kt

@@ -45,8 +45,6 @@ class AppUpdateService : Service() {
     private var runningCall: Call? = null
 
     override fun onCreate() {
-        super.onCreate()
-
         notifier = AppUpdateNotifier(this)
         wakeLock = acquireWakeLock(javaClass.name)
 
@@ -79,7 +77,6 @@ class AppUpdateService : Service() {
 
     override fun onDestroy() {
         destroyJob()
-        super.onDestroy()
     }
 
     private fun destroyJob() {

app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstallService.kt

@@ -22,7 +22,6 @@ class ExtensionInstallService : Service() {
     private var installer: Installer? = null
 
     override fun onCreate() {
-        super.onCreate()
         val notification = notificationBuilder(Notifications.CHANNEL_EXTENSIONS_UPDATE) {
             setSmallIcon(R.drawable.ic_tachi)
             setAutoCancel(false)
@@ -59,7 +58,6 @@ class ExtensionInstallService : Service() {
     }
 
     override fun onDestroy() {
-        super.onDestroy()
         installer?.onDestroy()
         installer = null
     }