Turn screen on on right-click

The right-click is almost useless on Android, so use it to turn the
screen on.

Add a new control event type (command) to request the server to turn the
screen on.

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -37,4 +37,8 @@ public class ServiceManager {
     public InputManager getInputManager() {
         return new InputManager(getService("input", "android.hardware.input.IInputManager"));
     }
+
+    public PowerManager getPowerManager() {
+        return new PowerManager(getService("power", "android.os.IPowerManager"));
+    }
 }