add margin in grid mode

Signed-off-by: Abdourahamane BOINAIDI <abdourahamane.boinaidi@infomaniak.com>

src/main/res/layout/grid_image.xml

@@ -40,7 +40,7 @@
                 android:id="@+id/thumbnail_shimmer"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                android:layout_margin="@dimen/standard_eigth_padding"
+                android:layout_margin="@dimen/grid_image_icon_margin"
                 android:contentDescription="@null"
                 android:scaleType="centerCrop"
                 android:visibility="gone"
@@ -53,7 +53,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:contentDescription="@null"
-                android:padding="@dimen/standard_eigth_padding"
+                android:padding="@dimen/grid_image_icon_margin"
                 android:scaleType="centerCrop"
                 android:src="@drawable/folder" />
         </FrameLayout>

src/main/res/values/dims.xml

@@ -116,6 +116,7 @@
     <dimen name="grid_image_shared_icon_layout_top_margin">24dp</dimen>
     <dimen name="grid_image_local_file_indicator_layout_width">16dp</dimen>
     <dimen name="grid_image_local_file_indicator_layout_height">16dp</dimen>
+    <dimen name="grid_image_icon_margin">9dp</dimen>
     <dimen name="grid_item_shared_icon_layout_top_margin">24dp</dimen>
     <dimen name="grid_item_local_file_indicator_layout_width">16dp</dimen>
     <dimen name="grid_item_local_file_indicator_layout_height">16dp</dimen>