Implement MAC lookup (#68)

* Implement MAC lookup

* Refine error processing

* Use long to store MAC consistently

* Link back to macvendors.co

* Undo some havoc

* Do not show mac spans for TV

* Show MAC and IP in a consistent order

* Add IP spans by ipinfo.io

* Add SpanFormatter

* Fix IPv6 ipinfo.io link

* Refine SpanFormatter

* Fix pressing the link

mobile/src/main/res/layout/listitem_client.xml

@@ -36,15 +36,16 @@
             android:layout_weight="1"
             android:orientation="vertical">
 
-            <TextView
+            <be.mygod.vpnhotspot.widget.LinkTextView
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@{client.title}"
                 android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
-                android:textIsSelectable="@{client.record.nickname.length() == 0}"
+                android:textIsSelectable="@{client.titleSelectable}"
                 tools:text="01:23:45:ab:cd:ef%p2p-p2p0-0"/>
 
             <be.mygod.vpnhotspot.widget.AutoCollapseTextView
+                android:id="@+id/description"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@{client.description}"

mobile/src/main/res/layout/listitem_interface.xml

@@ -41,6 +41,7 @@
                 tools:text="wlan0"/>
 
             <be.mygod.vpnhotspot.widget.AutoCollapseTextView
+                android:id="@+id/text"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@{data.text}"

mobile/src/main/res/layout/listitem_repeater.xml

@@ -44,6 +44,7 @@
                     android:textAppearance="@style/TextAppearance.AppCompat.Subhead"/>
 
                 <be.mygod.vpnhotspot.widget.AutoCollapseTextView
+                    android:id="@+id/addresses"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:text="@{data.addresses}"