Adjust list UX for platform consistency (#3142)

Most lists in the app use (explicitly or implicitly) platform metrics for dimensions, text size, colour, and so on, possibly via styles.

A few don't, inadvertently using the user's setting for status text size

Fix these, and simplify code where possible.

- Use android attributes for padding and height, for consistent UX.

- Remove explicit usage of app:tabTextAppearance, rely on the style.

- Remove ListSelectionAdapter and item_picker_list.xml, and adjust TabPreferenceActivity to use an ArrayAdapter with simple_list_item_1.xml

- Simplify item_followed_hashtag.xml, consistent with item_list.xml.

Fixes https://github.com/tuskyapp/Tusky/issues/3131

app/src/main/java/com/keylesspalace/tusky/adapter/ListSelectionAdapter.kt

@@ -1,41 +0,0 @@
-/* Copyright 2019 kyori19
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>. */
-
-package com.keylesspalace.tusky.adapter
-
-import android.content.Context
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import android.widget.ArrayAdapter
-import com.keylesspalace.tusky.R
-import com.keylesspalace.tusky.databinding.ItemPickerListBinding
-import com.keylesspalace.tusky.entity.MastoList
-
-class ListSelectionAdapter(context: Context) : ArrayAdapter<MastoList>(context, R.layout.item_picker_list) {
-    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
-        val binding = if (convertView == null) {
-            ItemPickerListBinding.inflate(LayoutInflater.from(context), parent, false)
-        } else {
-            ItemPickerListBinding.bind(convertView)
-        }
-
-        getItem(position)?.let { list ->
-            binding.root.text = list.title
-        }
-
-        return binding.root
-    }
-}