Use current user id when invoking omnient.

This is the CS Helper version of the change for u-patch.

Original fix in main: ag/27873355

Bug: 343426174
Test: Manual in guest and retail demo mode
Flag: exempt bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:1fa0a3f4390969a81de3adda7301239dcfe7ca33)
Merged-In: Ida0a72c513129c0225a0da90c67c1d584dd34610
Change-Id: Ida0a72c513129c0225a0da90c67c1d584dd34610