Remove serialNumber parameter from createUserStorageKeys

Remove the serialNumber parameter from
IStorageManager#createUserStorageKeys and
StorageManager#createUserStorageKeys, as it is not used.

Bug: 316035110
Test: presubmit
Flag: N/A, mechanical refactoring
Change-Id: I11f2507fefb374bea7c8de857424c67108fcb97e
4 files changed