Use system setting for default geolocation permissions

This reverts change I0be5dbf4d99d07ca13b07fb299155c5aa17a51bd
and adds an observer on the new default geolocation permission
secure setting.

Bug http://b/issue?id=2535598

Change-Id: I4edcbd3080b7d3af5dc6d74f26779b6d92248010
4 files changed