Put com.android.location.provider before services on the system server classpath.

Test: aosp_walleye-userdebug boots and there are no messages in the
  logcat regarding class loader context mismatch:

    $ adb logcat | grep 'mismatch'
    # empty

Bug: 147017252
Change-Id: I338685b9cf71681b5ca0c541752948934b656b46