[Emulator] Include the "Cell Broadcast Receiver" app

The Cell Broadcast Receiver app deal with special notifications
such as AMBER Alerts.

Some CTS Verifier tests check the user's ability to configure this app.

BUG: 32504713
Test: Manual and CTS Verifier

(cherry picked from 194e96d944fd736a0db0d97426ca2686d7a59a35)

Change-Id: Ia18bd5c763330f7520c9f445e15d9c3b197d796f