Revert "LockClock: remove play services lib define"

This reverts commit 34220d3053c5a49c324e1fa4f810181b9d409fb9.
Revert "LockClock: do not use GPS if Play Services is available"

This reverts commit c5a4398fae1116f0db5a6fe2b3a36fb74c4b723d.