Created an API to get encoded message of SubmitPuds

* Created a BT-speciic API which wrapped up BT usage of Telephony
  internal APIs.

Bug: 140562205
Test: Manual
Change-Id: I03f71fb94676e7e33e98cad2f5e05960f274a14a
Merged-In: I1a26bd306812a5f8489978cc6ac30770dcf3f0f1
2 files changed