DownloadController: Partial Compose conversion (#7969)

Item list is not changed as currently there is no fitting Compose component to
replace the drag-drop behavior.

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

@@ -30,6 +30,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="start"
+            android:layout_marginEnd="4dp"
             android:paddingHorizontal="10dp"
             android:paddingVertical="8dp"
             android:scaleType="center"

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

@@ -87,6 +87,7 @@
             android:id="@+id/menu"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:layout_marginEnd="4dp"
             android:layout_toEndOf="@id/download_progress_text"
             android:background="?attr/selectableItemBackgroundBorderless"
             android:contentDescription="@string/action_menu"

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

@@ -11,7 +11,6 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:clipToPadding="false"
-        android:paddingBottom="@dimen/fab_list_padding"
         tools:listitem="@layout/download_item" />
 
     <eu.kanade.tachiyomi.widget.MaterialFastScroll
@@ -22,11 +21,4 @@
         app:fastScrollerBubbleEnabled="false"
         tools:visibility="visible" />
 
-    <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>