Do not enable sleep mode in Android Auto (#7053)

When playback is started while an Android Auto projection is active, we want to
prevent automatic sleep timer from starting.

Note: the androidx.car.app library has not seen a full release since 1.2.0. We opted to use a release candidate here, which has a downgraded minSdk requirement, compatible with the current minSdk of AntennaPod at the time this dependency is introduced.

playback/service/build.gradle

@@ -26,6 +26,7 @@ dependencies {
     implementation project(':ui:chapters')
 
     annotationProcessor "androidx.annotation:annotation:$annotationVersion"
+    implementation "androidx.car.app:app:1.4.0-rc02"
     implementation "androidx.core:core:$coreVersion"
     implementation "androidx.appcompat:appcompat:$appcompatVersion"
     implementation "androidx.media:media:$mediaVersion"

playback/service/src/main/java/de/danoeh/antennapod/playback/service/PlaybackService.java

@@ -45,9 +45,12 @@ import androidx.annotation.DrawableRes;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
+import androidx.car.app.connection.CarConnection;
 import androidx.core.app.NotificationCompat;
 import androidx.core.app.NotificationManagerCompat;
 import androidx.core.content.ContextCompat;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.Observer;
 import androidx.media.MediaBrowserServiceCompat;
 
 import de.danoeh.antennapod.event.PlayerStatusEvent;
@@ -170,6 +173,9 @@ public class PlaybackService extends MediaBrowserServiceCompat {
     private MediaSessionCompat mediaSession;
 
     private static volatile MediaType currentMediaType = MediaType.UNKNOWN;
+    private LiveData<Integer> androidAutoConnectionState;
+    private boolean androidAutoConnected = false;
+    private Observer<Integer> androidAutoConnectionObserver;
 
     private final IBinder mBinder = new LocalBinder();
 
@@ -226,6 +232,11 @@ public class PlaybackService extends MediaBrowserServiceCompat {
 
         stateManager = new PlaybackServiceStateManager(this);
         notificationBuilder = new PlaybackServiceNotificationBuilder(this);
+        androidAutoConnectionState = new CarConnection(this).getType();
+        androidAutoConnectionObserver = connectionState -> {
+            androidAutoConnected = connectionState == CarConnection.CONNECTION_TYPE_PROJECTION;
+        };
+        androidAutoConnectionState.observeForever(androidAutoConnectionObserver);
 
         ContextCompat.registerReceiver(this, autoStateUpdated,
                 new IntentFilter("com.google.android.gms.car.media.STATUS"), ContextCompat.RECEIVER_EXPORTED);
@@ -318,6 +329,7 @@ public class PlaybackService extends MediaBrowserServiceCompat {
         currentMediaType = MediaType.UNKNOWN;
         castStateListener.destroy();
 
+        androidAutoConnectionState.removeObserver(androidAutoConnectionObserver);
         cancelPositionObserver();
         if (mediaSession != null) {
             mediaSession.release();
@@ -860,6 +872,10 @@ public class PlaybackService extends MediaBrowserServiceCompat {
                         int currentHour = now.get(Calendar.HOUR_OF_DAY);
                         autoEnableByTime = SleepTimerPreferences.isInTimeRange(fromSetting, toSetting, currentHour);
                     }
+                    if (androidAutoConnected) {
+                        Log.i(TAG, "Android Auto is connected, sleep timer will not be auto-enabled");
+                        autoEnableByTime = false;
+                    }
 
                     if (newInfo.getOldPlayerStatus() != null && newInfo.getOldPlayerStatus() != PlayerStatus.SEEKING
                             && SleepTimerPreferences.autoEnable() && autoEnableByTime && !sleepTimerActive()) {