Updating UI to show the battery percentage increase every 60s

	Updating UI to show the battery percentage increase every 60s

	BZ: 24777

	Whenever charger is connected/removed to the platform the UI should
	update the battery percetange increasing/decreasing. So, the UI update
	is done using the polling method rightnow. The interrupt based solution
 	is WIP and needs to be verified on few platforms before going into
	mainline.

Change-Id: Id42349b5ceb07b9e7144a1f2adfd8d9b2442d272
Signed-off-by: Pandey Raj <raj.pandey@intel.com>
Reviewed-on: http://android.intel.com:8080/40679
Reviewed-by: Pallala, Ramakrishna <ramakrishna.pallala@intel.com>
Tested-by: Kallappa Manjanna, MadhukumarX <madhukumarx.kallappa.manjanna@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>