Push gateway config (#4608)

* Read PushProvidersConfig parameter from BuildTimeConfig

* Update submodule link.

plugins/src/main/kotlin/ModulesConfig.kt

@@ -11,8 +11,8 @@ import config.PushProvidersConfig
 
 object ModulesConfig {
     val pushProvidersConfig = PushProvidersConfig(
-        includeFirebase = true,
-        includeUnifiedPush = true,
+        includeFirebase = BuildTimeConfig.PUSH_CONFIG_INCLUDE_FIREBASE,
+        includeUnifiedPush = BuildTimeConfig.PUSH_CONFIG_INCLUDE_UNIFIED_PUSH,
     )
 
     val analyticsConfig: AnalyticsConfig = if (isEnterpriseBuild) {

plugins/src/main/kotlin/config/BuildTimeConfig.kt

@@ -31,4 +31,7 @@ object BuildTimeConfig {
     val SERVICES_SENTRY_DSN: String? = null
     val BUG_REPORT_URL: String? = null
     val BUG_REPORT_APP_NAME: String? = null
+
+    const val PUSH_CONFIG_INCLUDE_FIREBASE = true
+    const val PUSH_CONFIG_INCLUDE_UNIFIED_PUSH = true
 }