MOBILE-2827 icon: Use small icon for Android notifications

config.xml

@@ -59,6 +59,10 @@
         <icon density="xhdpi" src="resources/android/icon/drawable-xhdpi-icon.png" />
         <icon density="xxhdpi" src="resources/android/icon/drawable-xxhdpi-icon.png" />
         <icon density="xxxhdpi" src="resources/android/icon/drawable-xxxhdpi-icon.png" />
+        <resource-file src="resources/android/icon/drawable-ldpi-smallicon.png" target="app/src/main/res/mipmap-ldpi/smallicon.png" />
+        <resource-file src="resources/android/icon/drawable-mdpi-smallicon.png" target="app/src/main/res/mipmap-mdpi/smallicon.png" />
+        <resource-file src="resources/android/icon/drawable-hdpi-smallicon.png" target="app/src/main/res/mipmap-hdpi/smallicon.png" />
+        <resource-file src="resources/android/icon/drawable-xhdpi-smallicon.png" target="app/src/main/res/mipmap-xhdpi/smallicon.png" />
     </platform>
     <platform name="ios">
         <icon height="57" src="resources/ios/icon/icon.png" width="57" />

src/addon/pushnotifications/providers/pushnotifications.ts

@@ -94,7 +94,8 @@ export class AddonPushNotificationsProvider {
             return {
                 android: {
                     senderID: CoreConfigConstants.gcmpn,
-                    sound: !!soundEnabled
+                    sound: !!soundEnabled,
+                    icon: 'smallicon'
                 },
                 ios: {
                     alert: 'true',

src/providers/local-notifications.ts

@@ -448,7 +448,7 @@ export class CoreLocalNotificationsProvider {
 
             if (this.platform.is('android')) {
                 notification.icon = notification.icon || 'res://icon';
-                notification.smallIcon = notification.smallIcon || 'res://icon';
+                notification.smallIcon = notification.smallIcon || 'res://smallicon';
 
                 const led: any = notification.led || {};
                 notification.led = {