Fixes FirebaseLoginPrompt input colors

Author: abeisgoat

library/src/main/res/layout/fragment_firebase_login.xml

@@ -26,7 +26,9 @@
                 android:id="@+id/email"
                 android:ems="10"
                 android:hint="Email"
-                android:paddingTop="20dp" />
+                android:paddingTop="20dp"
+                style="@style/FirebaseEditTextTheme"
+                android:theme="@style/FirebaseEditTextTheme"/>
 
             <EditText
                 android:layout_width="match_parent"
@@ -35,7 +37,9 @@
                 android:ems="10"
                 android:hint="Password"
                 android:paddingTop="20dp"
-                android:password="true" />
+                android:password="true"
+                style="@style/FirebaseEditTextTheme"
+                android:theme="@style/FirebaseEditTextTheme"/>
 
             <Button
                 android:layout_width="match_parent"

library/src/main/res/values/style.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="FirebaseEditTextTheme">
+        <item name="colorControlActivated">#1194F6</item>
+        <!-- colorControlActivated & colorControlHighlight use the colorAccent color by default -->
+    </style>
+</resources>