No longer export CallSubjectDialog am: 1ab4eeb65e am: c1cdeefa61 am: f75f24b361

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Dialer/+/17034410

Change-Id: I99e5bbf7dcfd818580477e7f03d08af5095d9f9d