Bluetooth: Fix to show internet access as marked when pan is connected

isPrefered is always true for PAN. So internet access menu checkbox
is always marked on. Marking internet access menu checkbox based on
pan connection status should solve this issue.

Change-Id: I4343cc6f1b46377caa54aa3d39c08489ff14adac
CRs-Fixed: 550731
Bluetooth: Set alias name only through Rename option

Set the alias name only when user is trying to change the
name using the Rename option of paired device.

CRs-Fixed: 539420
Change-Id: I415b6a962d8e7884b67d37b94c04df19e2c23012