Added support to blimp to be usable as a default browser

blimp/client/app/android/java/res/layout/blimp_main.xml

Index: blimp/client/app/android/java/res/layout/blimp_main.xml
diff --git a/blimp/client/app/android/java/res/layout/blimp_main.xml b/blimp/client/app/android/java/res/layout/blimp_main.xml
index 096adde36eb69e36239f5d9134d3bb8f481f2064..0c1bb51f2a635fd614539e11e299814c48378873 100644
--- a/blimp/client/app/android/java/res/layout/blimp_main.xml
+++ b/blimp/client/app/android/java/res/layout/blimp_main.xml
@@ -36,6 +36,14 @@
                 android:background="?android:attr/selectableItemBackground"
                 android:scaleType="center"
                 android:src="@drawable/btn_reload" />
+            <ImageButton
+                android:id="@+id/menu_button"
+                android:layout_width="wrap_content"
+                android:layout_height="48dp"
+                android:paddingEnd="4dp"
+                android:layout_gravity="center"
+                android:background="@null"
+                android:src="@drawable/btn_menu" />
         </org.chromium.blimp.toolbar.Toolbar>
         
         <!-- Content Area -->