Add battery information accessors#882

Merged

mykola-mokhnach merged 3 commits intoappium:masterfrom

mykola-mokhnach:battery

May 7, 2018

Commits on Apr 30, 2018

Add battery information accessors
Mykola Mokhnach
committed

Commits on May 1, 2018

Make "state" name common
Mykola Mokhnach
committed

Commits on May 2, 2018

Merge branch 'master' of https://github.com/mykola-mokhnach/java-client into battery
Mykola Mokhnach
committed