Add final qualifier in LocationPermissionChecker

This is a partial cherry-pick of a generic change that added final
qualifiers.

Bug: 181837977
Test: m
Merged-In: I832c9d70c3dfcd8d669cf71939d97837becc973a

Change-Id: Ib6fecc50b17c2f035ff79beaec4a643cf1d2b458
1 file changed