Simplified boot/init

app/src/main/java/eu/faircode/email/ActivityMain.java

@@ -83,7 +83,7 @@ public class ActivityMain extends ActivityBase implements FragmentManager.OnBack
                 protected void onExecuted(Bundle args, Boolean hasAccounts) {
                     if (hasAccounts) {
                         startActivity(new Intent(ActivityMain.this, ActivityView.class));
-                        ServiceSynchronize.boot(ActivityMain.this);
+                        ServiceSynchronize.init(ActivityMain.this);
                         ServiceSend.boot(ActivityMain.this);
                     } else
                         startActivity(new Intent(ActivityMain.this, ActivitySetup.class));

app/src/main/java/eu/faircode/email/ServiceSend.java

@@ -433,9 +433,6 @@ public class ServiceSend extends ServiceBase {
     }
 
     static void boot(final Context context) {
-        if (!booted) {
-            booted = true;
-
         Thread thread = new Thread(new Runnable() {
             @Override
             public void run() {
@@ -452,7 +449,6 @@ public class ServiceSend extends ServiceBase {
         thread.setPriority(THREAD_PRIORITY_BACKGROUND);
         thread.start();
     }
-    }
 
     static void start(Context context) {
         ContextCompat.startForegroundService(context,

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -1418,9 +1418,6 @@ public class ServiceSynchronize extends ServiceBase {
     };
 
     static void boot(final Context context) {
-        if (!booted) {
-            booted = true;
-
         Thread thread = new Thread(new Runnable() {
             @Override
             public void run() {
@@ -1443,9 +1440,7 @@ public class ServiceSynchronize extends ServiceBase {
                     int pollInterval = prefs.getInt("poll_interval", 0);
                     int accounts = db.account().getSynchronizingAccounts().size();
                     if (enabled && pollInterval == 0 && accounts > 0)
-                            ContextCompat.startForegroundService(context,
-                                    new Intent(context, ServiceSynchronize.class)
-                                            .setAction("init"));
+                        init(context);
                     else {
                         for (EntityAccount account : db.account().getAccounts())
                             db.account().setAccountState(account.id, null);
@@ -1463,6 +1458,11 @@ public class ServiceSynchronize extends ServiceBase {
         thread.setPriority(THREAD_PRIORITY_BACKGROUND);
         thread.start();
     }
+
+    static void init(Context context) {
+        ContextCompat.startForegroundService(context,
+                new Intent(context, ServiceSynchronize.class)
+                        .setAction("init"));
     }
 
     private static void schedule(Context context) {