files-clients-114: Styled 'more' and 'back' buttons with instance theme

Signed-off-by: daniele-verducci <daniele.verducci@nextcloud.com>

Author: daniele-verducci

app/src/main/java/com/owncloud/android/ui/fragment/OCFileListBottomSheetDialog.kt

@@ -152,6 +152,13 @@ class OCFileListBottomSheetDialog(
                 colorMaterialButtonContent(menuEncryptedMkdir, ColorRole.PRIMARY)
                 colorMaterialButtonContent(menuCreateRichWorkspace, ColorRole.PRIMARY)
                 colorMaterialButtonContent(menuMoreDocuments, ColorRole.PRIMARY)
+                colorMaterialButtonContent(menuBack, ColorRole.PRIMARY)
+
+                viewThemeUtils.platform.tintDrawable(
+                    context,
+                    binding.menuMoreDocumentsExpand.drawable,
+                    ColorRole.PRIMARY
+                )
             }
         }
 

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

@@ -85,6 +85,7 @@
                             app:iconTint="@color/primary"/>
 
                         <ImageView
+                            android:id="@+id/menu_more_documents_expand"
                             android:layout_width="wrap_content"
                             android:layout_height="wrap_content"
                             android:layout_gravity="end"