commit 60f6a25af838f8e193a2325b55f98455479ce048
author Mill Chen <millchen@google.com> Fri Oct 05 22:11:45 2018 +0800
committer Mill Chen <millchen@google.com> Wed Oct 24 20:01:53 2018 +0800
tree 85c43669d19147a1ca7545e7d12e03b1bb6751d3
parent d7a2569034cf07907a3e4e1d7196a4c549c3ceb9

Add Battery slice in Contextual Settings Homepage

- Add Battery card that implements CustomSliceable in Contextual
Settings Homepage.
- Add test case for Battery slice.
- Created a loadBatteryInfo method for BatterySlice.
- Add a map in CustomSliceManager to cache CustomSliceable instances,
let existing battery slice be able to update battery info.
- Use a flag to avoid triggering an infinite loop when calling
notifyChange in the callback function.

Bug: 114796623, 115971399
Test: manual, robotests
Change-Id: I4b785708bf8456c6c4de7cae4b44f8a060bccbae