Revert "Expose uids related APIs in NetworkRequest and NetworkCa..."

Revert "Add shims for NetworkRequest"

Revert submission 1626206-replaceUidRange

Reason for revert: Breaking build - b/183106405
Reverted Changes:
I0b79c73e8:Add shims for NetworkRequest
I4bc0daf5a:Replace the usage of UidRange
I4e5aec6ef:Replace the usage of UidRange
I107c329d4:Expose uids related APIs in NetworkRequest and Net...

Change-Id: I45e08f89533af0d6851add38fecb5c6c114615ae