Fix #197 Shortcuts for Android 7

Added a shortcut to create a new note for Android 7 and above.

app/src/main/AndroidManifest.xml

@@ -11,8 +11,8 @@
         android:fullBackupContent="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
-        android:supportsRtl="true"
         android:networkSecurityConfig="@xml/network_security_config"
+        android:supportsRtl="true"
         android:theme="@style/OwnCloud">
 
         <activity
@@ -31,6 +31,8 @@
             <meta-data
                 android:name="android.app.default_searchable"
                 android:value="it.niedermann.owncloud.notes.android.activity.NotesListViewActivity" />
+            <meta-data android:name="android.app.shortcuts"
+                android:resource="@xml/shortcuts" />
         </activity>
 
         <activity

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

@@ -100,10 +100,12 @@
     <string name="widget_all_notes_title">All notes</string>
     <string name="widget_single_note_title">Single note</string>
 
+    <!-- Shortcuts -->
+    <string name="shortcut_create_long">Create a new note</string>
 
     <!-- Plurals -->
     <plurals name="ab_selected">
         <item quantity="one">%d selected</item>
         <item quantity="other">%d selected</item>
     </plurals>
-</resources>
+</resources>

app/src/main/res/xml/shortcuts.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shortcuts xmlns:android="http://schemas.android.com/apk/res/android">
+    <shortcut
+        android:shortcutId="it.niedermann.owncloud.notes"
+        android:enabled="true"
+        android:icon="@drawable/ic_action_new_theme"
+        android:shortcutShortLabel="@string/action_create"
+        android:shortcutLongLabel="@string/shortcut_create_long">
+        <intent
+            android:action="android.intent.action.VIEW"
+            android:targetPackage="it.niedermann.owncloud.notes"
+            android:targetClass="it.niedermann.owncloud.notes.android.activity.CreateNoteActivity" />
+        <categories android:name="android.shortcut.conversation" />
+    </shortcut>
+</shortcuts>