Merge "Revert "Make the intent of TTY_PREFERRED_MODE_CHANGED protected"" into sc-qpr1-dev am: 7141413c13

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/15999809

Change-Id: Ib59198d2bdb86aacc11091aa605d5ec3b4755ab0