Add Android readme.

byte-buddy-android/README.md

@@ -0,0 +1,20 @@
+# Byte Buddy Android
+
+**Byte Buddy Android** allows you to generate classes on Android and to load them into the current Android VM process. To load classes on Android, the `AndroidClassLoadingStrategy` must be used when loading a dynamic type:
+
+```java
+ClassLoadingStrategy strategy = new AndroidClassLoadingStrategy.Wrapping(context.getDir(
+  "generated", 
+  Context.MODE_PRIVATE));
+
+Class<?> dynamicType = new ByteBuddy()
+  .subclass(Object.class)
+  .method(ElementMatchers.named("toString"))
+  .intercept(FixedValue.value("Hello World!"))
+  .make()
+  .load(getClass().getClassLoader(), strategy)
+  .getLoaded();
+assertThat(dynamicType.newInstance().toString(), is("Hello World!"))
+```
+
+Using the strategy requires Android with support for API version 21 or later. A wrapping and an injecting class loading strategy is offered, similar to Byte Buddy's standard strategies. On Android, it is not possible to transform loaded classes or to register a Java agent.