Remove FixedTouchableHighlight , fix Android press issues (#3214)

* rm `FixedTouchableHighlight`

* adjust delay for highlight

* remove unnecessary background colors to support background ripple

src/view/com/posts/FeedItem.tsx

@@ -144,7 +144,6 @@ let FeedItemInner = ({
 
   const outerStyles = [
     styles.outer,
-    pal.view,
     {
       borderColor: pal.colors.border,
       paddingBottom:

src/view/com/posts/FeedSlice.tsx

@@ -78,11 +78,7 @@ function ViewFullThread({slice}: {slice: FeedPostSlice}) {
   }, [slice.rootUri])
 
   return (
-    <Link
-      style={[pal.view, styles.viewFullThread]}
-      href={itemHref}
-      asAnchor
-      noFeedback>
+    <Link style={[styles.viewFullThread]} href={itemHref} asAnchor noFeedback>
       <View style={styles.viewFullThreadDots}>
         <Svg width="4" height="40">
           <Line