Fix 3342063: Correctly update StatusView when battery changes.

LockScreen wasn't correctly updating StatusView when the battery
status changed.  In addition, the messages aren't supposed to
"pop" when changed, so changed visibility state from GONE to INVISIBLE
when not in use.

Change-Id: Icacbf7e2275c77a28e7e0a9d1247abdbebadcd4f
3 files changed