[webapi] Update cases due to spec update for Battery Status API

- New spec:https://dvcs.w3.org/hg/dap/raw-file/default/battery/Overview.html

Impacted tests(approved): new 9, update 0, delete 24
Unit test platform: [Android][IVI]
Unit test summary: pass 9, fail 0, block 0
Merge pull request #1009 from kangxu/kangxu/webapi/tct-batterystatus-w3c-tests/updateCases

[webapi] Update cases due to spec update for Battery Status API