Bug 997626 - [bluez] Handle RequestPairingConsent event and reply pairing confirmation directly, r=echou, f=btian, a=1.3t+

Consent pairing event raises under the following conditions:
1. Local IO capabilities are DisplayYesNo and remote IO capabiltiies are DisplayOnly or NoInputNoOutput.
2. Call PairingConsent callback for "incoming" request.
This patch is try to directly reply pairing confirmation for consent cases.

How to test:
1. Initialize pairing request with IO capabilities-NoInputNoOutput as
headset role to b2g phone
2. Check pairing status of bluetooth headset
Bumping manifests a=b2g-bump
Bumping manifests a=b2g-bump
Bumping manifests a=b2g-bump
Bumping manifests a=b2g-bump
Backed out changeset 5b707364d8ce (bug 988880) for suspicion of causing Mnw perma-fail.
CLOSED TREE
Bug 957688 - Remove checkaccess junk from the XBL compilation scope. r=mrbkap a=1.3t+
Bug 993772 - Stop serializing principals along with scripts. r=mrbkap a=1.3t+

The principal of a script is determined by the compartment these days, so this
field is useless.
Bug 993772 - Introduce a singleton compilation scope. r=mrbkap a=1.3t+
Bug 993772 - Switch to the singleton compilation scope for XBL compilation. r=mrbkap a=1.3t+
Bug 993772 - Remove nsXBLDocGlobalObject. r=mrbkap a=1.3t+
Bug 993772 - Switch to the singleton compilation scope for XUL prototype compilation. r=mrbkap a=1.3t+
Bug 993772 - Remove nsXULPDGlobalObject. r=mrbkap a=1.3t+
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-1_3/rev/43a87e9c7d71
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #18172 from jaoo/991628-v1.3

[v1.3] Bug 991628 - [Settings][OMA CP] Not possible to select an APN received via OMA CP message if there is already one with the same name

========

https://hg.mozilla.org/integration/gaia-1_3/rev/e01702a152fa
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 991628 - [Settings][OMA CP] Not possible to select an APN received via OMA CP message if there is already one with the same name
Bumping manifests a=b2g-bump
Merge b2g28 to v1.3t. a=merge
Bumping manifests a=b2g-bump