Remove jcenter()

[Queatz]

I tried to remove jcenter() from my project but I get the following error. We should not need to have jcenter() anymore!

> Could not resolve all dependencies for configuration ':app:debugRuntimeClasspath'.
   > Could not find org.protoojs.droid:protoo-client:4.0.3.
     Searched in the following locations:
       - https://developer.huawei.com/repo/org/protoojs/droid/protoo-client/4.0.3/protoo-client-4.0.3.pom
       - https://jitpack.io/org/protoojs/droid/protoo-client/4.0.3/protoo-client-4.0.3.pom
       - https://dl.google.com/dl/android/maven2/org/protoojs/droid/protoo-client/4.0.3/protoo-client-4.0.3.pom
       - https://repo.maven.apache.org/maven2/org/protoojs/droid/protoo-client/4.0.3/protoo-client-4.0.3.pom
     Required by:
         project :app > live.videosdk:rtc-android-sdk:0.1.38