[MEP]Uncomment the EuiccManager switchToSubscription changes.

Currently targetSdk enforcement inside switchToSubscription
(without port) API is commented as apps such as tycho and CBRS
are not yet adopted to the new Android T APIs.

Test: Manually tested esim scenarios and atest executed
Bug: 221887933
Merged-In: I8faf9cf58db7c9204193643d4fa710d6d6608d55
Change-Id: I7b1897df2ff350ef43617c3ede140ef4beb83165