Don't animate images that will be posted as JPGs (#8760)

* don't play gifs that'll be png'd

* add media inset border

* fix unnecessary typecast

* Revert "fix unnecessary typecast"

This reverts commit 3a8bcc9277.

src/view/com/composer/photos/Gallery.tsx

@@ -21,6 +21,7 @@ import {type ComposerImage, cropImage} from '#/state/gallery'
 import {Text} from '#/view/com/util/text/Text'
 import {useTheme} from '#/alf'
 import * as Dialog from '#/components/Dialog'
+import {MediaInsetBorder} from '#/components/MediaInsetBorder'
 import {type PostAction} from '../state/composer'
 import {EditImageDialog} from './EditImageDialog'
 import {ImageAltTextDialog} from './ImageAltTextDialog'
@@ -227,8 +228,12 @@ const GalleryItem = ({
         }}
         accessible={true}
         accessibilityIgnoresInvertColors
+        cachePolicy="none"
+        autoplay={false}
       />
 
+      <MediaInsetBorder />
+
       <ImageAltTextDialog
         control={altTextControl}
         image={image}