[RESTRICT AUTOMERGE] Fix Autofill Inflating as User 0

Autofill will inflate views as the current foreground user instead of
the system_server user (0).

Bug: 327137311
Test: atest CtsAutoFillServiceTestCases --user-type secondary_user
Flag: EXEMPT security bug fix
Change-Id: I8a2c96259976e61d297dec914d10d86e585a6d6f