Allow the user to set a "large icon"

Need to actually test this.

README.md

@@ -120,14 +120,6 @@ cordova.plugins.backgroundMode.wakeUp();
 cordova.plugins.backgroundMode.unlock();
 ```
 
-### Request to disable battery optimizations
-Starting in Android 8, apps can be put to sleep to conserve battery. When this happens (usually after 5 minutes or so), the background task is killed. This will cause things like MQTT connections to break.
-This method will show a permission prompt for the user (only if the app hasn't been granted permission) to ignore the optimization.
-
-```js
-cordova.plugins.backgroundMode.disableWebViewOptimizations();
-```
-
 ### Notification
 To indicate that the app is executing tasks in background and being paused would disrupt the user, the plug-in has to create a notification while in background - like a download progress bar.
 

src/android/ForegroundService.java

@@ -27,6 +27,7 @@ import android.app.*;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
+import android.graphics.BitmapFactory;
 import android.graphics.drawable.Icon;
 import android.os.Binder;
 import android.os.Build;
@@ -189,6 +190,7 @@ public class ForegroundService extends Service {
         String text     = settings.optString("text", NOTIFICATION_TEXT);
         boolean bigText = settings.optBoolean("bigText", false);
         String subText = settings.optString("subText", "");
+        String largeIcon = settings.optString("largeIcon", null);
 
         Context context = getApplicationContext();
         String pkgName  = context.getPackageName();
@@ -206,6 +208,10 @@ public class ForegroundService extends Service {
             notification.setSubText(subText);
         }
 
+        if (largeIcon != null) {
+            notification.setLargeIcon(BitmapFactory.decodeResource(getResources(), getIconResId(largeIcon)));
+        }
+
         if (settings.optBoolean("allowClose", false)) {
 
             final Intent clostAppIntent = new Intent("com.backgroundmode.close" + pkgName);

src/ios/APPBackgroundMode.m

@@ -222,7 +222,7 @@ NSString* const kAPPBackgroundEventDeactivate = @"deactivate";
     NSString* flag = [NSString stringWithFormat:@"%@._isActive=%@;",
                       kAPPBackgroundJsNamespace, active];
 
-    NSString* depFn = [NSString stringWithFormat:@"%@.on('%@');",
+    NSString* depFn = [NSString stringWithFormat:@"%@.on%@();",
                        kAPPBackgroundJsNamespace, event];
 
     NSString* fn = [NSString stringWithFormat:@"%@.fireEvent('%@');",

www/background-mode.js

@@ -419,6 +419,7 @@ exports._defaults = {
     hidden:             true,
     color:              undefined,
     icon:               'icon',
+	largeIcon:          undefined,
     channelName:        'cordova-plugin-background-mode',
     channelDescription: 'cordova-plugin-background-moden notification',
     allowClose:         false,