Fix incorrect use of UserHandle#getUserHandleForUid(int uid)

Two issues were mixed here.
issue 1) User ID was used when UID was necessary.
issue 2) Caller UID was used when checking target UID.

Note that this bug would affect multi-user environment.

Bug: 162548695
Test: Build and run CTS
Change-Id: I83909b4a6c82af805a26848fe4a0189c579ddf0d