title: Manifest merger failed : Attribute application
body: <p>i try builiding my app but it errors out like this</p>
  
  <blockquote>
    <p>Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91
        is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
        Suggestion: add 'tools:replace="android:appComponentFactory"' to  element at AndroidManifest.xml:9:5-53:19 to override.</p>
  </blockquote>