com/example/myapplication/utilities/Constants.java
 com.example.myapplication.utilities.Constants
com/example/myapplication/databinding/ActivitySignInBinding.java
 com.example.myapplication.databinding.ActivitySignInBinding
com/example/myapplication/utilities/PreferenceManager.java
 com.example.myapplication.utilities.PreferenceManager
com/example/myapplication/BuildConfig.java
 com.example.myapplication.BuildConfig
com/example/myapplication/databinding/ActivitySignUpBinding.java
 com.example.myapplication.databinding.ActivitySignUpBinding
com/example/myapplication/databinding/ActivityMainBinding.java
 com.example.myapplication.databinding.ActivityMainBinding
com/example/myapplication/firebase/MessagingService.java
 com.example.myapplication.firebase.MessagingService
com/example/myapplication/activities/MainActivity.java
 com.example.myapplication.activities.MainActivity
com/example/myapplication/activities/SignInActivity.java
 com.example.myapplication.activities.SignInActivity
com/example/myapplication/activities/SignUpActivity.java
 com.example.myapplication.activities.SignUpActivity
