refactor: improve structuring of classes and their implementations

BREAKING CHANGE: various changes in which packages classes previously where and their implementation

src/main/kotlin/app/revanced/patcher/util/proxy/ClassProxy.kt

@@ -8,34 +8,26 @@ import org.jf.dexlib2.iface.ClassDef
  *
  * A class proxy simply holds a reference to the original class
  * and allocates a mutable clone for the original class if needed.
- * @param immutableClass The class to proxy
+ * @param immutableClass The class to proxy.
  */
-class ClassProxy(
+class ClassProxy internal constructor(
     val immutableClass: ClassDef,
 ) {
-    internal var proxyUsed = false
-    internal lateinit var mutatedClass: MutableClass
-
-    init {
-        // in the instance, that a [MutableClass] is being proxied,
-        // do not create an additional clone and reuse the [MutableClass] instance
-        if (immutableClass is MutableClass) {
-            mutatedClass = immutableClass
-            proxyUsed = true
-        }
-    }
+    /**
+     * Weather the proxy was actually used.
+     */
+    internal var resolved = false
 
     /**
-     * Allocates and returns a mutable clone of the original class.
-     * A patch should always use the original immutable class reference
-     * to avoid unnecessary allocations for the mutable class.
-     * @return A mutable clone of the original class.
+     * The mutable clone of the original class.
+     *
+     * Note: This is only allocated if the proxy is actually used.
      */
-    fun resolve(): MutableClass {
-        if (!proxyUsed) {
-            proxyUsed = true
-            mutatedClass = MutableClass(immutableClass)
-        }
-        return mutatedClass
+    val mutableClass by lazy {
+        resolved = true
+        if (immutableClass is MutableClass) {
+            immutableClass
+        } else
+            MutableClass(immutableClass)
     }
 }