Vendor dependencies for 0.3.0 release

vendor/android-properties/examples/property_refresh.rs

@@ -0,0 +1,12 @@
+use android_properties::{setprop, AndroidProperty};
+
+const HELLO_WORLD_PROPERTY: &str = "hello.world";
+
+fn main() {
+    setprop(HELLO_WORLD_PROPERTY, "initial value").expect("Cannot set android property");
+    let hello_world = AndroidProperty::new(HELLO_WORLD_PROPERTY);
+    println!("Initial property: {}", hello_world);
+
+    setprop(HELLO_WORLD_PROPERTY, "refreshed value").expect("Cannot set android property");
+    println!("Refreshed property: {}", hello_world);
+}