RIL: update emergencyNumber code

Change-Id: Ic142f2d6ea2f48835ab73a9f22a766d0acd5a55d
(cherry picked from commit e51b53aa57b98ed939af320d35d31bbb4e9ee820)
Enable large heap for Trebuchet

Change-Id: I89da84d33e9c2f64fe95526bf6eb46af8a30b246
(cherry picked from commit 823e92e6b55e12c99dc0fd070cfe4dbe36956de3)