Replaced recurring background fetch with Firebase solution including broadcast function

app/build.gradle

@@ -9,8 +9,8 @@ android {
         applicationId "com.denizd.substitutionplan"
         minSdkVersion 21
         targetSdkVersion 28
-        versionCode 22
-        versionName "2.1.5"
+        versionCode 23
+        versionName "2.2.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
@@ -35,6 +35,8 @@ dependencies {
     implementation 'com.google.android.material:material:1.1.0-alpha09'
     implementation 'com.android.support:customtabs:28.0.0'
 
+    implementation 'com.google.firebase:firebase-messaging:19.0.1'
+
 //    implementation 'androidx.core:core-ktx:1.0.2'
 
     implementation 'com.jaredrummler:android-device-names:1.1.8'
@@ -55,3 +57,5 @@ dependencies {
 repositories {
     mavenCentral()
 }
+
+apply plugin: 'com.google.gms.google-services'