Adds Edit Armor screen to edit a monster's armor stats.

app/src/main/java/com/majinnaibu/monstercards/helpers/ArrayHelper.java

@@ -0,0 +1,15 @@
+package com.majinnaibu.monstercards.helpers;
+
+import java.util.Objects;
+
+public final class ArrayHelper {
+    public static int indexOf(Object[] array, Object target) {
+        for (int index = 0; index < array.length; index++) {
+            if (Objects.equals(array[index], target)) {
+                return index;
+            }
+        }
+
+        return -1;
+    }
+}