No longer export CallSubjectDialog am: 1ab4eeb65e am: c1cdeefa61 am: f75f24b361 am: 097a2cc909

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

Change-Id: I0e2e40aa731452279c7f0a8513c5ad26a82788cd