title: Firebase Crashlytics not reporting crashes
body: <p>I have <strong>successfully integrated Firebase</strong> into my project<br>
  (Authentication and Storage works great) but after the simple integration of Crashlytics and crashing my app on purpose (and not on purpose :) - <b>No crash report</b> appear in the crash dashboard.<br>
  i do see in Logcat: <br>
  D/FirebaseApp: com.google.firebase.crash.FirebaseCrash is not linked. Skipping initialization<br>
  <strong>I/CrashlyticsCore: Crashlytics report upload complete: 5BEDB1320329-0001-43</strong>...<br><br>
  i have already integrated Crashlytics into 3 other apps with no problem, but for some reason it doesn't work in my new app.<br>
  Can anyone think of what i have missed?<br><br></p>
  
  <p>a freshly downloaded google-services.json file is in place
  <br>and i added to the project gradle file:</p>
  
  <pre>
  
      buildscript {
          repositories {
              maven {
                 url 'https://maven.fabric.io/public'
              }
          }
          dependencies {
              classpath 'com.google.gms:google-services:4.2.0'
              classpath 'io.fabric.tools:gradle:1.26.1'
          }
      }
  
      allprojects {
          repositories {
             // ...
             maven {
                 url 'https://maven.google.com/'
             }
          }
      }
  
  </pre>
  
  <p>and added to the app gradle file:<br></p>
  
  <pre>
  
      apply plugin: 'io.fabric'
  
      dependencies {
          // ...
          implementation 'com.google.firebase:firebase-core:16.0.5'
          implementation 'com.crashlytics.sdk.android:crashlytics:2.9.6'
      }
  
  </pre>
  
  <p>Thanks for your thoughts<br><br></p>
  
  <p><strong>Update</strong><br>
  enabling Crashlytics debug logs shows that <strong>the crash was captured and reported</strong> but still nothing shows in the project's Firebase Crashlytics dashboard<br></p>
  
  <pre><code>D/CrashlyticsCore: Checking for crash reports...
  D/CrashlyticsCore: Found crash report /data/.../files/.Fabric/com.crashlytics.sdk.android.crashlytics-core/fatal-sessions/5BEEA22001B0-0001-21C3-C00BC3A0D0B2.cls
  D/CrashlyticsCore: Attempting to send 1 report(s)
  D/Answers: Response code for analytics file send is 200
  D/CrashlyticsCore: Adding single file 5BEEA22001B0-0001-21C3-C00BC3A0D0B2.cls to report 5BEEA22001B0-0001-21C3-C00BC3A0D0B2
  D/CrashlyticsCore: Sending report to: https://reports.crashlytics.com/spi/v1/platforms/android/apps/com.salt.logomaker/reports
  D/CrashlyticsCore: Create report request ID: null
  D/CrashlyticsCore: Result was: 202
  I/CrashlyticsCore: Crashlytics report upload complete: 5BEEA22001B0-0001-21C3-C00BC3A0D0B2
  D/CrashlyticsCore: Removing report at /data/.../files/.Fabric/com.crashlytics.sdk.android.crashlytics-core/fatal-sessions/5BEEA22001B0-0001-21C3-C00BC3A0D0B2.cls
  D/CrashlyticsCore: Checking for crash reports...
  D/CrashlyticsCore: No reports found.
  </code></pre>