Fix lint errors

lint.xml

@@ -6,4 +6,5 @@
     <issue id="InvalidPackage" severity="ignore"/>
     <issue id="NewApi" severity="ignore"/>
     <issue id="ValidFragment" severity="ignore"/>
+    <issue id="ImpliedQuantity" severity="ignore"/>
 </lint>

src/main/res/layout/fragment_navigation_drawer.xml

@@ -1,9 +1,10 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
 
-    <ListView xmlns:tools="http://schemas.android.com/tools"
+    <ListView
         android:id="@android:id/list"
         android:layout_width="match_parent"
         android:layout_height="0dp"

src/main/res/layout/task_list_wrapper.xml

@@ -12,7 +12,7 @@
 
         <include layout="@layout/toolbar"/>
 
-        <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        <FrameLayout
             android:id="@+id/tasklist_fragment_container"
             android:background="?attr/asContentBackground"
             android:layout_width="match_parent"