Revert change, it seems to be a cache issue in CI

Author: daymxn

firebase-crashlytics/firebase-crashlytics.gradle

@@ -72,7 +72,7 @@ dependencies {
     runtimeOnly 'com.google.firebase:firebase-installations:17.1.3'
     implementation 'com.google.firebase:firebase-measurement-connector:18.0.2'
     implementation "com.google.android.gms:play-services-tasks:18.0.1"
-    implementation project(':firebase-sessions')
+    implementation 'com.google.firebase:firebase-sessions:1.0.2'
 
     javadocClasspath 'com.google.code.findbugs:jsr305:3.0.2'