Also require owner review for IME CTS

This is a follow up CL to our recent effort [1] to require owner review
for IME-related changes under frameworks/base.  For consistency, let's
do the same thing for IME CTS.

 [1]: I0dd7bad55dec4f2332d7819d4ccb1e0da7a2d9b7
      15ef780c0d994e1f91a3fa2f734fe8c87a8d0a8e

Bug: 149926050
Test: N/A
Merged-In: Ie3704cc4b58ed341f7885550a05c95c6abb85cc2
Change-Id: Ie3704cc4b58ed341f7885550a05c95c6abb85cc2
(cherry picked from commit 5567c267338e56eec117fb9de6e2a5cf03122279)
3 files changed