Notification Improvements (#594)

* Download notifier improvements

* Notification improvements

Added a Notification Service.

Added a Notification Activity Handler.

* Removed service. Everything is now managed by single broadcast

* Fixed some flags

* Fixed ReaderActivity call

* Code review

* Added Handler. Removed dismiss onDestroy

app/src/main/res/layout/activity_download_manager.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:fitsSystemWindows="true">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <android.support.design.widget.AppBarLayout
+            android:id="@+id/appbar"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <include layout="@layout/toolbar"/>
+
+        </android.support.design.widget.AppBarLayout>
+
+        <FrameLayout
+            android:id="@+id/frame_container"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <android.support.v7.widget.RecyclerView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:id="@+id/recycler"
+                tools:listitem="@layout/item_download"/>
+
+            <eu.kanade.tachiyomi.widget.EmptyView
+                android:id="@+id/empty_view"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:visibility="gone"/>
+        </FrameLayout>
+    </LinearLayout>
+
+</android.support.design.widget.CoordinatorLayout>

app/src/main/res/menu/menu_navigation.xml

@@ -26,7 +26,8 @@
         <item
             android:id="@+id/nav_drawer_downloads"
             android:icon="@drawable/ic_file_download_black_24dp"
-            android:title="@string/label_download_queue" />
+            android:title="@string/label_download_queue"
+            android:checkable="false" />
     </group>
     <group android:id="@+id/group_settings"
            android:checkableBehavior="single">

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

@@ -260,6 +260,7 @@
     <string name="chapter_downloading">Downloading</string>
     <string name="chapter_downloading_progress">Downloading (%1$d/%2$d)</string>
     <string name="chapter_error">Error</string>
+    <string name="chapter_paused">Paused</string>
     <string name="fetch_chapters_error">Error while fetching chapters</string>
     <string name="show_title">Show title</string>
     <string name="show_chapter_number">Show chapter number</string>
@@ -383,5 +384,6 @@
     <string name="download_notifier_page_ready_error">A page is not loaded</string>
     <string name="download_notifier_text_only_wifi">No wifi connection available</string>
     <string name="download_notifier_no_network">No network connection available</string>
+    <string name="download_notifier_download_paused">Download paused</string>
 
 </resources>