Adding `Locked` field in the `showmap` output

Bug: 241415578
Test: Compare `Locked` values from Showmap output matched `Locked` values from smaps file
Test: Showmap [raw] output before change:
https://paste.googleplex.com/4989707787173888
Test: Showmap [raw] output after change:
https://paste.googleplex.com/5744132214489088
Test: Showmap [json] output with Locked:
https://paste.googleplex.com/5592727134666752
Test: Showmap [csv] output with Locked:
https://paste.googleplex.com/4651079949090816
Change-Id: Ic86c971ed2b88fff18490040ca3716881b342661
3 files changed