Remove redundant namespace

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

@@ -48,7 +48,7 @@
             android:layout_marginTop="@dimen/gallery_widget_margin_v"
             android:textColor="?android:attr/textColorSecondary" />
 
-        <com.hippo.widget.BatteryView xmlns:app="http://schemas.android.com/apk/res-auto"
+        <com.hippo.widget.BatteryView
             android:id="@+id/battery"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

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

@@ -53,7 +53,7 @@
         android:gravity="center_horizontal"
         android:text="@string/no_download_info" />
 
-    <com.hippo.widget.FabLayout xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.FabLayout
         android:id="@+id/fab_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"