Revert "gs101: update shared_modem_platform sepolicy for UMI"

Revert submission 28762313

Reason for revert: Droidmonitor created revert due to b/360059249.

Reverted changes: /q/submissionid:28762313

Change-Id: I4ffb476a64b32a4e725c894f8014070121848cc0
1 file changed