expo-image tweaks (#10710)

src/components/contacts/FindContactsBannerNUX.tsx

@@ -60,6 +60,7 @@ export function FindContactsBannerNUX() {
                 a.self_end,
                 a.mt_sm,
               ]}
+              useAppleWebpCodec
             />
             <View style={[a.flex_1, a.justify_center, a.py_xl, a.pr_5xl]}>
               <Text

src/components/contacts/components/HeroImage.tsx

@@ -27,6 +27,7 @@ export function ContactsHeroImage() {
         alt={_(
           msg`An illustration depicting user avatars flowing from a contact book into the Bluesky app`,
         )}
+        useAppleWebpCodec
       />
     </View>
   )