Bluetooth: Implement PBAP PullPhoneBook

Implement PBAP server functionalities - PullPhoneBook.

BUG=b:424465503
TEST=Manually test using PBAP client tool

Change-Id: I9f909542148bf61a3e1e0e191ff117819bb4a912
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/chameleon/+/7075723
Commit-Queue: Manish Mandlik <mmandlik@chromium.org>
Tested-by: Manish Mandlik <mmandlik@chromium.org>
Reviewed-by: John Lai <johnlai@google.com>