Applied some minor UI changes (see below)

+ Changed wifi icons to teal
+ Removed “Secured with …” from network status
+ Added an empty state image above text when Wi-Fi is off
+ Removed Wi-Fi Direct and WPS Push button from overflow menu
+ Added Wi-Fi Direct and WPS Push button to Advance Activity
+ Input Password Dialog: Moved Signal Strength and Security to Advance
+ Input Password Dialog: Updated Password text to Material style

BugId: #15698824 #15702808
Change-Id: I542ab9aac2c098738330c92d9183d3907c4f0b38

res/layout/wifi_dialog.xml

@@ -148,6 +148,8 @@
                        style="@style/wifi_item" >
                 <TextView
                         style="@style/wifi_item_label"
+                        android:textAppearance="@android:style/TextAppearance.Material.Body2"
+                        android:textColor="?android:attr/colorAccent"
                         android:text="@string/wifi_password" />
 
                 <EditText android:id="@+id/password"