[UI + Dependencies] Applied new style + added firebase

Added the Firebase Dependency and login flow. Also applied some new
styling. The new color is more reddish.

build.gradle

@@ -1,4 +1,5 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
 id 'com.android.application' version '8.2.0-beta03' apply false
+id 'com.google.gms.google-services' version '4.4.2' apply false
 }