MAP: Fix to handle crash when transparent flag is set.

Usecase:
1) Establish MAP session with Event Notification ON.
2) send message from carkit with transparent flag set
to true

Issue:
Bluetooth crashes while deleting message when transparent
flag is set.

Root Cause:
content resolver is unable to get provider to
delete message at specified uri.

Fix:
Modify the message uri to be deleted to SMS content URI
as follows
Format: "content://sms/<sms_index>"

Test: Checked if no crash after performing above usecase.

Bug: 63550557
Change-Id: Ifc3e563fc9574c2f9d11128a3c6be2a6e741bfb0