Change the order of permission checks for READ_PHONE_STATE.

This is needed for 2 reasons:
1. If called as self, OP_READ_PHONE_STATE check should not be done.
2. If caller does not have permission, exception should be thrown
for READ_PHONE_STATE.

Bug: 22128902
Change-Id: Ibd4de0c5ba314700b6b3d7a59f502d2a21b7d86f