Show toast "checking for update..." every time user starts manual check

When user toggles auto updates in settings it will firstly show
"check for update..." toast as like if user presses to button of
manual check. It adds consistency and allows to reuse manual check
in other places of the app

Author: Yevhen Babiichuk (DustDFG)

app/src/main/java/org/schabi/newpipe/NewVersionWorker.kt

@@ -175,6 +175,15 @@ class NewVersionWorker(
          */
         @JvmStatic
         fun enqueueNewVersionCheckingWork(context: Context, isManual: Boolean) {
+            if (isManual) {
+                ContextCompat.getMainExecutor(context).execute {
+                    Toast.makeText(
+                        context,
+                        R.string.checking_updates_toast,
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
+            }
             val workRequest = OneTimeWorkRequestBuilder<NewVersionWorker>()
                 .setInputData(workDataOf(IS_MANUAL to isManual))
                 .build()

app/src/main/java/org/schabi/newpipe/settings/UpdateSettingsFragment.java

@@ -3,7 +3,6 @@
 import android.app.AlertDialog;
 import android.content.Context;
 import android.os.Bundle;
-import android.widget.Toast;
 
 import androidx.preference.Preference;
 import androidx.preference.PreferenceManager;
@@ -25,7 +24,6 @@ public class UpdateSettingsFragment extends BasePreferenceFragment {
     };
 
     private final Preference.OnPreferenceClickListener manualUpdateClick = preference -> {
-        Toast.makeText(getContext(), R.string.checking_updates_toast, Toast.LENGTH_SHORT).show();
         NewVersionWorker.enqueueNewVersionCheckingWork(requireContext(), true);
         return true;
     };