Steps to reproduce the problem:
Hi,

In android I am trying to migrate from GCM to FCM

I am currently using chromium version 69.0.3497.100

I have added all aar files required for Firebase messaging and linked their dependencies. 

I am using Firebase messaging version 12.0.1. 

But when i run ninja command after integration it gives following error. 

Exception in thread "main" java.lang.RuntimeException: java.lang.ClassNotFoundException: com.google.android.gms.measurement.AppMeasurement
	at org.chromium.bytecode.CustomClassLoaderClassWriter.getCommonSuperClass(CustomClassLoaderClassWriter.java:34)
	at org.objectweb.asm.ClassWriter.a(Unknown Source)
	at org.objectweb.asm.Frame.a(Unknown Source)
	at org.objectweb.asm.Frame.a(Unknown Source)
	at org.objectweb.asm.MethodWriter.visitMaxs(Unknown Source)
	at org.objectweb.asm.MethodVisitor.visitMaxs(Unknown Source)
	at org.objectweb.asm.ClassReader.a(Unknown Source)
	at org.objectweb.asm.ClassReader.b(Unknown Source)
	at org.objectweb.asm.ClassReader.accept(Unknown Source)
	at org.objectweb.asm.ClassReader.accept(Unknown Source)
	at org.chromium.bytecode.ByteCodeProcessor.process(ByteCodeProcessor.java:95)
	at org.chromium.bytecode.ByteCodeProcessor.main(ByteCodeProcessor.java:154)

Can anyone suggest how it can be resolved ? Thanks in advance.

What is the expected behavior?

What went wrong?
Unable to integrate play-services-measurement into firebase messaging 12.0.1, since play-services-measurement last version is 8.4.0 and adding it as dependency creates multiple play-service-basement dependencies to be added 
play-service-basement 12.0.1
play-service-basement 8.4.0

which would give the following error
Exception: Package name "com.google.android.gms" appeared twice. All android_resources() targets must use unique package names, or no package name at all.
ninja: build stopped: subcommand failed.

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 69.0.3497.100  Channel: stable
OS Version: 
Flash Version: