[fenix] Closes https://github.com/mozilla-mobile/fenix/issues/372 - Change Toolbar Menu and Security Icon Colors

app/src/main/res/layout/component_search.xml

@@ -1,9 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
-<mozilla.components.browser.toolbar.BrowserToolbar
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
-        xmlns:android="http://schemas.android.com/apk/res/android"
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<mozilla.components.browser.toolbar.BrowserToolbar xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/toolbar"
     android:layout_width="match_parent"
     android:layout_height="40dp"
     android:clickable="true"
     android:focusable="true"
-        android:focusableInTouchMode="true" />
+    android:focusableInTouchMode="true"
+    app:browserToolbarInsecureColor="@color/icons"
+    app:browserToolbarMenuColor="@color/icons"
+    app:browserToolbarSecureColor="@color/icons" />