Remove FixedTouchableHighlight , fix Android press issues (#3214)

* rm `FixedTouchableHighlight`

* adjust delay for highlight

* remove unnecessary background colors to support background ripple

src/view/com/post-thread/PostThreadItem.tsx

@@ -432,7 +432,6 @@ let PostThreadItemLoaded = ({
           <PostHider
             testID={`postThreadItem-by-${post.author.handle}`}
             href={postHref}
-            style={[pal.view]}
             moderation={moderation.content}
             iconSize={isThreadedChild ? 26 : 38}
             iconStyles={
@@ -622,7 +621,6 @@ function PostOuterWrapper({
     return (
       <View
         style={[
-          pal.view,
           pal.border,
           styles.cursor,
           {
@@ -650,7 +648,6 @@ function PostOuterWrapper({
     <View
       style={[
         styles.outer,
-        pal.view,
         pal.border,
         showParentReplyLine && hasPrecedingItem && styles.noTopBorder,
         styles.cursor,