fix(Search): display bot icon only for bots

Due to the way Android handles lists, the icon could be wrongly shown on
non-bot accounts.

Fixes LucasGGamerM#418.

mastodon/src/main/java/org/joinmastodon/android/ui/viewholders/AccountViewHolder.java

@@ -148,10 +148,8 @@ public void onBind(AccountViewModel item){
 		pronouns.setVisibility(pronounsString.isPresent() ? View.VISIBLE : View.GONE);
 		pronounsString.ifPresent(p -> HtmlParser.setTextWithCustomEmoji(pronouns, p, item.account.emojis));
 
-		if(item.account.bot) {
-			botIcon.setVisibility(View.VISIBLE);
-		}
-
+		botIcon.setVisibility(item.account.bot ? View.VISIBLE : View.GONE);
+
 		/* unused in megalodon
 		boolean hasVerifiedLink=item.verifiedLink!=null;
 		if(!hasVerifiedLink)