Bluetooth: MAP-FTP: Handle BT MAP-FTP forced close

Introduce NULL check to handle NULLPOINTER exception occurs during
MAP and FTP Service.

CRs-Fixed: 538606
Change-Id: I14de4ce4d7671d317e3c3a8207b7d82a988fe3ee
Merge "Bluetooth: MAP-FTP: Handle BT MAP-FTP forced close"
MAP: Email message size in Bytes instead of characters.

Set Email Message Body LENGTH in Bytes instead of characters
for GetMessage Response.

Change-Id: I54bfe74182a64bca584d8bb6e9ec0a7f7cc86287
CRs-fixed: 514436
Merge "MAP: Email message size in Bytes instead of characters."
Merge branch 'master' of git://codeaurora.org/platform/vendor/qcom-opensource/bluetooth into bt