DO NOT MERGE: Remove shortname for session-id in SubPlanCreator

The short name "s" collides with the short name for tradefed's "serial" option and causes retry to fail for sessions specifying serial numbers.

Test: run cts -m CtsPreferenceTestCases -s <device-serial>, then retry with run cts -r <last session>
bug: 32703023
bug: 32707500
Change-Id: I0b71477a29f51bd8dfc81de1fd785da079499f17
(cherry picked from commit 6d72c231304d7b59c555dd0ee9711997dfda5421)
(cherry picked from commit 5175db05d66b26351e840936efd29a107e4953b8)
2 files changed