Fix "launchInApp" notifications in background

- Dispatch a visibility change event on the webview.
- Allows running of asynchronous code in webview (otherwise not working)
- Remove no longer used checkAppInForeground() methods in receivers

src/android/LocalNotification.java

@@ -718,6 +718,11 @@ private static synchronized void sendJavascript(final String js) {
         ((Activity) (view.getContext())).runOnUiThread(new Runnable() {
             public void run() {
                 view.loadUrl("javascript:" + js);
+                View engineView = view.getEngine().getView();
+
+                if (!isInForeground()) {
+                    engineView.dispatchWindowVisibilityChanged(View.VISIBLE);
+                }
             }
         });
     }

src/android/RestoreReceiver.java

@@ -81,11 +81,6 @@ public boolean checkAppRunning() {
         return isAppRunning();
     }
 
-    @Override
-    public boolean checkAppInForeground() {
-        return isInForeground();
-    }
-
     /**
      * Build notification specified by options.
      *

src/android/TriggerReceiver.java

@@ -76,11 +76,6 @@ public boolean checkAppRunning() {
         return isAppRunning();
     }
 
-    @Override
-    public boolean checkAppInForeground() {
-        return isInForeground();
-    }
-
     /**
      * Build notification specified by options.
      *

src/android/notification/receiver/AbstractNotificationReceiver.java

@@ -3,10 +3,6 @@
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.os.PowerManager;
-import android.util.Log;
-
-import org.json.JSONException;
-import org.json.JSONObject;
 
 import java.util.Calendar;
 
@@ -26,8 +22,6 @@
  * The base class for any receiver that is trying to display a notification.
  */
 abstract public class AbstractNotificationReceiver extends BroadcastReceiver {
-    private final String TAG = "AbstractNotification";
-
     /**
      * Perform a notification.  All notification logic is here.
      * Determines whether to dispatch events, autoLaunch the app, use fullScreenIntents, etc.
@@ -40,13 +34,6 @@ public void performNotification(Notification notification) {
         PowerManager pm = (PowerManager) context.getSystemService(POWER_SERVICE);
         boolean autoLaunch = options.isAutoLaunchingApp() && SDK_INT <= P && !options.useFullScreenIntent();
 
-        // Check device sleep status here (not after wake)
-        // If device is asleep in this moment, waking it up with our wakelock
-        // is not enough to allow the app to have CPU to trigger an event
-        // in Android 8+.  Limitations on CPU can also occur when the app is in the background,
-        // so prevent that as well.
-        boolean canTriggerInApp = SDK_INT < O ||
-            (pm != null && pm.isInteractive() && checkAppInForeground());
         int badge = options.getBadgeNumber();
 
         if (badge > 0) {
@@ -67,8 +54,7 @@ public void performNotification(Notification notification) {
         //   2.  Any SDK >= Oreo is asleep (must be triggered here)
         boolean didShowNotification = false;
         if (!options.triggerInApp() ||
-            (!autoLaunch && !checkAppRunning())
-            || !canTriggerInApp
+            (!autoLaunch && !checkAppRunning())            
         ) {
             didShowNotification = true;
             notification.show();
@@ -90,34 +76,11 @@ public void performNotification(Notification notification) {
 
         Calendar cal = Calendar.getInstance();
         cal.add(MINUTE, 1);
-
-        Request req = new Request(
-            getOptionsWithBaseDate(options, cal.getTimeInMillis()),
-            cal.getTime()
-        );
+        Request req = new Request(options, cal.getTime());
 
         manager.schedule(req, this.getClass());
     }
 
-    /**
-     * Clone options with base date attached to trigger.
-     * Used so that persisted objects know the last execution time.
-     * @param baseDateMillis base date represented in milliseconds
-     * @return new Options object with base time set in requestBaseDate.
-     */
-    private Options getOptionsWithBaseDate(Options options, long baseDateMillis) {
-        JSONObject optionsDict = options.getDict();
-        try {
-            JSONObject triggerDict = optionsDict.getJSONObject("trigger");
-            triggerDict.put("requestBaseDate", baseDateMillis);
-            optionsDict.remove("trigger");
-            optionsDict.put("trigger", triggerDict);
-        } catch (JSONException e) {
-            Log.e(TAG, "Unexpected error adding requestBaseDate to JSON structure: " + e.toString());
-        }
-        return new Options(optionsDict);
-    }
-
     /**
      * Send the application an event using our notification
      * @param key key for our event in the app
@@ -132,8 +95,6 @@ private Options getOptionsWithBaseDate(Options options, long baseDateMillis) {
      */
     abstract public boolean checkAppRunning();
 
-    abstract public boolean checkAppInForeground();
-
     /**
      * Wakeup the device.
      *