Cleanups in Notification.java.
Cleanups in Notification.java.

Bug: 7555827 // remove named TODO, fix toString output
Bug: 6440961 // remove longstanding and mysterious "MUMBLE MUMBLE"
Change-Id: I8b5e16fb1f7ccbe5cbda37f260fdc6bc0e1b8ee3

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base