Add on battery time to Binder/Looper stats

Binder/Looper stats data is collected only when the device
is on battery. Adding the time on battery to dumpsys output
will make it easier to analize the data.

Test: UT and manually checked dumpsys output
Change-Id: I0536e718399181cb62f5de6bbd24a6fb73c26e7e
7 files changed