use public OneSignal SDK

This is designed as a public example so it should point to the public
SDK and not the local source for a real world example.
To keep the dev env working well we can make a change to the dev
build.gradle to swap implementations out

Author: jkasten2

Examples/OneSignalDemo/app/build.gradle

@@ -68,13 +68,12 @@ dependencies {
     //  manifest merger conflicts
 //    implementation 'com.onesignal:OneSignal:3.12.6'
 
-    // Test local OneSignal SDK
-    gmsImplementation(project(':onesignal'))
+    gmsImplementation('com.onesignal:OneSignal:4.6.3')
 
     huaweiImplementation 'com.huawei.hms:push:5.3.0.304'
     huaweiImplementation 'com.huawei.hms:location:4.0.0.300'
     // Omit Google / Firebase libraries for Huawei builds.
-    huaweiImplementation(project(':onesignal')) {
+    huaweiImplementation('com.onesignal:OneSignal:4.6.3') {
         exclude group: 'com.google.android.gms', module: 'play-services-gcm'
         exclude group: 'com.google.android.gms', module: 'play-services-analytics'
         exclude group: 'com.google.android.gms', module: 'play-services-location'