title: Firebase-core 17.0 dependency conflicts with Appcompat-v7
body: <blockquote>
    <p>Dependencies using groupId com.android.support and androidx.* can not
    be combined but found
    IdeMavenCoordinates{myGroupId='com.android.support',
    myArtifactId='slidingpanelayout', myVersion='28.0.0', myPacking='aar',
    myClassifier='null'} and
    IdeMavenCoordinates{myGroupId='androidx.versionedparcelable',
    myArtifactId='versionedparcelable', myVersion='1.0.0',
    myPacking='aar', myClassifier='null'} incompatible dependencies
    less... (Ctrl+F1)  Inspection info:There are some combinations of
    libraries, or tools and libraries, that are incompatible, or can lead
    to bugs. One such incompatibility is compiling with a version of the
    Android support libraries that is not the latest version (or in
    particular, a version lower than your targetSdkVersion).</p>
  </blockquote>
  
  <p>That error is showing on <code>implementation 'com.android.support:appcompat-v7:28.0.0'</code> when i use <code>implementation 'com.google.firebase:firebase-core:17.0.0'</code></p>