FirebaseRemoteConfig Error "No value of type 'String' exists for parameter key" : <p>I am using Firebase Core and some other Features, but not Remote Config. Multiple times a second the following Output is on Logcat. </p>

<p>Where can I disable the Remote Config functionality or even set those non-existing values?</p>

<p>Dependencies:</p>

<pre><code>// Project
classpath 'com.android.tools.build:gradle:3.2.1'
classpath 'com.google.gms:google-services:4.2.0'
classpath 'com.google.firebase:firebase-plugins:1.2.0'

classpath 'io.fabric.tools:gradle:1.26.1'

// Module
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-vector-drawable:28.0.0'
implementation 'com.android.support:preference-v7:28.0.0'
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'org.jsoup:jsoup:1.11.3'
implementation 'com.squareup.okhttp3:okhttp:3.11.0'
implementation 'com.android.support:cardview-v7:28.0.0'

implementation 'com.google.firebase:firebase-core:16.0.8'
implementation 'com.google.firebase:firebase-messaging:17.5.0'
implementation 'com.google.firebase:firebase-perf:16.2.4'
implementation 'com.google.android.gms:play-services-location:16.0.0'
implementation 'com.jsibbold:zoomage:1.2.0'
implementation 'com.android.support:exifinterface:28.0.0'
implementation 'com.squareup.picasso:picasso:2.71828'

implementation 'com.crashlytics.sdk.android:crashlytics:2.9.9'
</code></pre>

<pre><code>W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'sessions_max_length_minutes'.
W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'sessions_max_length_minutes'.
W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'sessions_feature_enabled'.
W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'sessions_max_length_minutes'.
W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'fpr_vc_trace_sampling_rate'.
W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'sessions_feature_enabled'.
W/FirebaseRemoteConfig: No value of type 'String' exists for parameter key 'fpr_vc_trace_sampling_rate'.
</code></pre>

<p><em>It is not causing any problems I think, just annoying that it spams the Console.</em></p>
