Added resource power manager stats to batterystats

Currently Resource Power Management (e.g. VMIN time) is reported in the
batterystats history each time the battery level changes. We need this
information in the batterystats checkin, and need to be able to
differentiate time spent in each power state/voter, total as well as
when the screen is off.
The RPM information is obtained via a JNI call to the appropriate HALs.

Batterystats report version is increased to 26.

Bug: 62549421
Test: manual
Change-Id: I0c384eb3950714d8a0aa1353a4bf965330ebc8c1