Revert "SystemUI: Battery View Fixes"

This reverts commit 97245d107f9c503a3edfa0ae84f4f69d1ddd4aae.
UsbDebuggingManager : Handle race condition when toggling rapidly

When toggling adb enable/disable rapidly, you can have the situation where the thread's
run() gets invoked but mAdbEnabled is already set to false, hence listenToSocket() never even
gets invoked in which case mOutputStream/mSocket are both null. This patchset adds checks
around that.

Change-Id: Iba56e7409435e22d690432fa663bc0a04a1a447d

Conflicts:
	services/java/com/android/server/usb/UsbDebuggingManager.java