Adds ability score picker.

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal"
+    tools:context=".ui.components.AbilityScorePicker">
+
+    <TextView
+        android:id="@+id/label"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_weight="1" />
+
+    <Spinner
+        android:id="@+id/spinner"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent" />
+</merge>