ProfileList: Add the list fragment in code so it knows the layout

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/res/layout-land/profile_list_activity.xml

@@ -5,12 +5,11 @@
     android:baselineAligned="false"
     android:orientation="horizontal">
 
-    <fragment
-        android:name="com.wireguard.android.ProfileListFragment"
+    <FrameLayout
+        android:id="@+id/list_container"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
-        android:tag="list" />
+        android:layout_weight="1" />
 
     <FrameLayout
         android:id="@+id/fragment_container"

app/src/main/res/layout/profile_list_activity.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<fragment xmlns:android="http://schemas.android.com/apk/res/android"
-    android:name="com.wireguard.android.ProfileListFragment"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/list_container"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:tag="list" />
+    android:layout_height="match_parent" />

app/src/main/res/layout/profile_list_item.xml

@@ -11,6 +11,7 @@
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:background="?android:attr/activatedBackgroundIndicator"
         android:padding="16dp">
 
         <TextView