Revert "Adding option to use/unuse the LED for notifications"

This reverts commit 5677e473820c6b77c96d4c279f1a0efc1e41fcbb.

Conflicts:
	emailcommon/src/com/android/emailcommon/provider/Account.java
	src/com/android/email/NotificationController.java
	src/com/android/email/activity/setup/AccountSettingsFragment.java
Merge 4.3_r2.1 changes