Update location permission check for ConnectivityUtil

This CL does following updates for the ConnectivityUtil class:
1. Remove the current profile check from location permission
check since it's not related to location permission check.
2. Makes all the checking functions to static to avoid memory
allocation
3. Rename the class from util to checker.

Bug: 148180968
Bug: 148232681
Bug: 148233000
Test: atest FrameworksNetTest
Change-Id: Ibf8879fe7dbcecdf766b959cb052d4d825b9b24c
Merged-In: Ibf8879fe7dbcecdf766b959cb052d4d825b9b24c