Fix AOD battery updates

It's not accurate to assume that events are only interesting when
the keyguard is visible. The user might be unlocked watching a
video or executing any other task and will miss a battery update.

Now dumping KeyguardIndicationController internals, to make it
easier to debug future issues.

Change-Id: I20efa011e20e92713a19fac32acea40604133f6d
Fixes: 72211244
Test: adb bugreport
Test: Play video, look at battery on AOD
Test: Lock phone, wait for battery update