Remove protected broadcast from preferred tty mode

Make ACTION_TTY_PREFERRED_MODE_CHANGE a non-protected broadcast so
Dialer can send it. It's now protected by MODIFY_PHONE_STATE.

Bug: 169196062
Test: manual
Change-Id: I745be34a48eb8e66c45e27a0fda61bb09991675c
(cherry picked from commit b49a7d7b509686adca2a8b2ec5965a7748b11311)
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 45642bb..8deb139 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -24,7 +24,6 @@
 
     <original-package android:name="com.android.phone" />
 
-    <protected-broadcast android:name="android.telecom.action.TTY_PREFERRED_MODE_CHANGED" />
     <protected-broadcast android:name="android.telecom.action.CURRENT_TTY_MODE_CHANGED" />
     <protected-broadcast android:name="android.intent.action.SERVICE_STATE" />
     <protected-broadcast android:name="android.intent.action.RADIO_TECHNOLOGY" />