Adding batterystats history to proto dump.

It will only print out a dump for userdebug or eng builds.

This is the same change as the pi-dev one (http://ag/3909863), but due
to changes in master, that change has a merge conflict, so I have to
create a separate CL for master.

Bug: 77727638
Test: it builds
Change-Id: Ib74d4c664f23a61e6fc33f700ba6a3c6fad32c74