Adds more styling to demo app

Author: abeisgoat

app/src/main/res/drawable/incoming_message.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:top="1dp">
+        <shape
+            android:shape="rectangle"
+            xmlns:android="http://schemas.android.com/apk/res/android">
+            <solid android:color="#BEDEE8" />
+        </shape>
+    </item>
+</layer-list>

app/src/main/res/drawable/outgoing_message.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:top="1dp">
+        <shape
+            android:shape="rectangle"
+            xmlns:android="http://schemas.android.com/apk/res/android">
+            <solid android:color="#E8E8E8" />
+        </shape>
+    </item>
+</layer-list>

app/src/main/res/fabric.properties

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+apiSecret=YOUR_BUILD_SECRET
+apiKey=YOUR_API_KEY

app/src/main/res/menu/chat_login_menu.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:uidemo="http://schemas.android.com/apk/res-auto">
+        <item android:id="@+id/login_menu_item"
+            android:title="Login"
+            uidemo:showAsAction="always"/>
+        <item android:id="@+id/logout_menu_item"
+            android:title="Logout"
+            uidemo:showAsAction="always"/>
+</menu>

library/src/main/java/com/firebase/ui/com/firebasei/ui/authimpl/PasswordAuthHelper.java

@@ -0,0 +1,42 @@
+package com.firebase.ui.com.firebasei.ui.authimpl;
+
+import android.app.Activity;
+import android.content.Context;
+
+import com.firebase.client.AuthData;
+import com.firebase.client.Firebase;
+import com.firebase.client.FirebaseError;
+
+public class PasswordAuthHelper extends FirebaseAuthHelper {
+
+    private final String LOG_TAG = "PasswordAuthHelper";
+
+    public final static String PROVIDER_NAME = "password";
+
+    private TokenAuthHandler mHandler;
+    private Activity mActivity;
+    private Firebase mRef;
+
+    public PasswordAuthHelper(Context context, Firebase ref, TokenAuthHandler handler) {
+        mActivity = (Activity) context;
+        mRef = ref;
+        mHandler = handler;
+    }
+
+    public void login(String email, String password) {
+        mRef.authWithPassword(email, password, new Firebase.AuthResultHandler() {
+            @Override
+            public void onAuthenticated(AuthData authData) {
+                mHandler.onSuccess(authData);
+            }
+            @Override
+            public void onAuthenticationError(FirebaseError firebaseError) {
+                mHandler.onUserError(firebaseError);
+            }
+        });
+    }
+
+    public String getProviderName() { return PROVIDER_NAME; }
+    public Firebase getFirebaseRef() { return mRef; }
+    public void logout() {}
+}