android: make toolbar visuals easier to change

Change-Id: I5b4dd8b8c407640cfcd9f366cecfaf6deb0cb3be

android/source/res/layout/toolbar.xml

@@ -2,9 +2,13 @@
 
 <android.support.v7.widget.Toolbar
     android:id="@+id/toolbar"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:elevation="3dp">
+    android:elevation="3dp"
+    android:background="@color/toolbar_background"
+    app:theme="@style/LibreOfficeTheme.Toolbar"
+    app:popupTheme="@style/LibreOfficeTheme">
 
 </android.support.v7.widget.Toolbar>

android/source/res/values/colors.xml

@@ -92,6 +92,9 @@
 
     <color name="panel_grid_item_image_background">#D1D9E1</color>
 
+    <color name="toolbar_forgeround">#3e3e3e</color>
+    <color name="toolbar_background">#ffffff</color>
+
     <color name="handle_color">#40A040</color>
 
 </resources>

android/source/res/values/themes.xml

@@ -14,4 +14,9 @@
         <item name="android:textColor">@android:color/black</item>
         <item name="android:textSize">15sp</item>
     </style>
+
+    <style name="LibreOfficeTheme.Toolbar" parent="Theme.AppCompat.Light.NoActionBar">
+        <item name="colorPrimary">@color/toolbar_background</item>
+    </style>
+
 </resources>