Revert: Prevent auto-granting of location permission via DPM

Revert the change where the DPC could no longer set location permissions
by calling DevicePolicyManager.setPermissionGrantState.

Bug: 148631522
Bug: 147650798
Test: manual
Test: see cts tests in associated CL.
Change-Id: Ic6ebb7c8001a8e356296bc6459fc3530e0531070