migrate mozilla components into project

packages/flutter_mozilla_components/android/src/main/res/layout/fragment_browser.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - 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/. -->
+
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+        <mozilla.components.ui.widgets.VerticalSwipeRefreshLayout
+            android:id="@+id/swipeToRefresh"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+            <!-- Inject engine here -->
+        </mozilla.components.ui.widgets.VerticalSwipeRefreshLayout>
+    </FrameLayout>
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>