Revert "heic: Recognize HEIC files only if they have gainmap"

PiperOrigin-RevId: 703342844

src/parser/mp4box.rs

@@ -70,18 +70,12 @@ impl FileTypeBox {
     pub fn is_avif(&self) -> bool {
         // "avio" also exists but does not identify the file as AVIF on its own. See
         // https://aomediacodec.github.io/av1-avif/v1.1.0.html#image-and-image-collection-brand
-        if self.has_brand_any(&["avif", "avis"]) {
-            return true;
-        }
-        match (cfg!(feature = "heic"), cfg!(android_soong)) {
-            (false, _) => false,
-            (true, false) => self.has_brand("heic"),
-            (true, true) => {
-                // This is temporary. For the Android Framework, recognize HEIC files only if they
-                // also contain a gainmap.
-                self.has_brand("heic") && self.has_tmap()
-            }
-        }
+        self.has_brand_any(&[
+            "avif",
+            "avis",
+            #[cfg(feature = "heic")]
+            "heic",
+        ])
     }
 
     pub fn needs_meta(&self) -> bool {