FirebaseUI for Android v2.3.0

FirebaseUI for Android v2.3.0 contains a number of bug fixes and small improvements:

Auth:

• Fix consumer proguard rules that broke optimization (#845)
• Improve profile merging support (#859)
• Fix dismiss dialog crash (#861) (#857)
• Deprecate ResultCodes (#852)
• Improved phone authentication UX (#846)
• Vector drawable support (#814)

Database:

• Fix onDataChanged bug in the index adapters (#847)

This version has the following notable transitive dependencies:

Dependency	Version
Firebase / Play services	11.0.4
Support Library	26.0.1