[MM-55606]: add the request context to all public methods in server/channels/app/brand.go (#25542)

Co-authored-by: Sudheer Tripathi <sudheer@clearglass.com>

server/channels/api4/brand.go

@@ -20,7 +20,7 @@ func (api *API) InitBrand() {
 func getBrandImage(c *Context, w http.ResponseWriter, r *http.Request) {
 	// No permission check required
 
-	img, err := c.App.GetBrandImage()
+	img, err := c.App.GetBrandImage(c.AppContext)
 	if err != nil {
 		w.WriteHeader(http.StatusNotFound)
 		w.Write(nil)
@@ -65,7 +65,7 @@ func uploadBrandImage(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if err := c.App.SaveBrandImage(imageArray[0]); err != nil {
+	if err := c.App.SaveBrandImage(c.AppContext, imageArray[0]); err != nil {
 		c.Err = err
 		return
 	}
@@ -86,7 +86,7 @@ func deleteBrandImage(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if err := c.App.DeleteBrandImage(); err != nil {
+	if err := c.App.DeleteBrandImage(c.AppContext); err != nil {
 		c.Err = err
 		return
 	}