-Added dropdown to start play for all StreamInfoItem.

-Refactored NavigationHelper to allow service player control to open anywhere.
-Refactored NavigationHelper to allow starting player at anywhere.

app/src/main/res/values/attrs.xml

@@ -20,6 +20,7 @@
     <attr name="history" format="reference"/>
     <attr name="drag_handle" format="reference"/>
     <attr name="selected" format="reference"/>
+    <attr name="more_vertical" format="reference"/>
 
     <!-- Can't refer to colors directly into drawable's xml-->
     <attr name="toolbar_shadow_drawable" format="reference"/>

app/src/main/res/values/strings.xml

@@ -310,4 +310,6 @@
     <string name="play_queue_stream_detail">Details</string>
     <string name="play_queue_audio_settings">Audio Settings</string>
     <string name="hold_to_append">Hold To Enqueue</string>
+    <string name="enqueue_on_background">Enqueue on Background</string>
+    <string name="enqueue_on_popup">Enqueue on Popup</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -27,6 +27,7 @@
         <item name="history">@drawable/ic_history_black_24dp</item>
         <item name="drag_handle">@drawable/ic_drag_handle_black_24dp</item>
         <item name="selected">@drawable/ic_fiber_manual_record_black_24dp</item>
+        <item name="more_vertical">@drawable/ic_more_vert_black_24dp</item>
 
         <item name="separator_color">@color/light_separator_color</item>
         <item name="contrast_background_color">@color/light_contrast_background_color</item>
@@ -65,6 +66,7 @@
         <item name="history">@drawable/ic_history_white_24dp</item>
         <item name="drag_handle">@drawable/ic_drag_handle_white_24dp</item>
         <item name="selected">@drawable/ic_fiber_manual_record_white_24dp</item>
+        <item name="more_vertical">@drawable/ic_more_vert_white_24dp</item>
 
         <item name="separator_color">@color/dark_separator_color</item>
         <item name="contrast_background_color">@color/dark_contrast_background_color</item>