Make location providers upgradeable.

Use config_netowrkLocationProviderPackageName and
config_geocodeProviderPackageName as intial packages. If another
package exists (or is later installed) that also implements a
provider, and has the same signatures as the original providers,
and has a hgiher version number, then use that instead.

The old code used a funky fix of package name substring checks
and service checks that was broken and not upgradeable.

Bug: 6499445
Change-Id: Ic58f09cf85d31d9abf47707093e22f31dda25cf0