For mozilla-mobile#162 - add build flag for firebase push service

app/build.gradle

@@ -455,7 +455,9 @@ dependencies {
     implementation Deps.mozilla_ui_widgets
 
     implementation Deps.mozilla_lib_crash
-    implementation Deps.mozilla_lib_push_firebase
+    if (project.ext.buildFeatures['firebasePushService']) {
+        implementation Deps.mozilla_lib_push_firebase
+    }
     implementation Deps.mozilla_lib_dataprotect
     debugImplementation Deps.leakcanary
 

app/src/features/firebasePushService/stub/java/org/mozilla/fenix/push/FirebasePushService.kt

@@ -0,0 +1,16 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.push
+
+import android.content.Context
+import mozilla.components.concept.push.PushService
+
+@SuppressWarnings("EmptyFunctionBlock")
+class FirebasePushService : PushService {
+    override fun deleteToken() {}
+    override fun isServiceAvailable(context: Context): Boolean { return false }
+    override fun start(context: Context) {}
+    override fun stop() {}
+}

app/src/main/AndroidManifest.xml

@@ -265,6 +265,7 @@
 
         <service
             android:name=".push.FirebasePushService"
+            android:enabled="@bool/ENABLE_FEATURE_FIREBASE_PUSH_SERVICE"
             android:exported="false">
             <intent-filter>
                 <action android:name="com.google.firebase.MESSAGING_EVENT" />