Implemented a fixed width for local file indicator

Signed-off-by: Kilian Périsset <kilian.perisset@infomaniak.com>

src/main/res/layout/list_item.xml

@@ -68,7 +68,7 @@
         <ImageView
             android:id="@+id/localFileIndicator"
             android:layout_width="@dimen/list_item_local_file_indicator_layout_width"
-            android:layout_height="wrap_content"
+            android:layout_height="@dimen/list_item_local_file_indicator_layout_height"
             android:contentDescription="@string/downloader_download_succeeded_ticker"
             android:scaleType="fitCenter"
             android:src="@drawable/ic_synced"