Frameworks: follow charging notification settings also for wireless charging

Originally, system would play a fixed notification sound when wireless
charging starts from com.android.server.power.Notifier.java regardless
of the Charging sounds settings. This removes the notification from
Notifier.java which means the system will notify about wireless charging
in the same (configurable) way as for normal wired charging.

Change-Id: I034fc95f8ac3554ef1d463ac94bebd5a448e1a3f