wlan: Fix for delay in PNO scan trigger after p2p disconnect.

If PNO is disabled due to concurrent active p2p session,
on P2P disconnect PNO scan is not triggered until the next
framework scan is scheduled.
To mitigate this issue trigger the PNO scan on receiving
P2P_CONNECTION_CHANGED intent in disconnect state of the
wifi state machine.

Change-Id: I9de116f4c82ce103a5787f91b7c7129748fee517
CRs-Fixed: 584058
framework/base: get proper obb mountpoint based on user handle

Due to invalid obb mount point, CTS test case was failing to mount
obb file at /mnt/shell/emulated/0. Added new API to support user
based mount point for obb.

Change-Id: I9f113bd98ab3a4af00dd7f788b2dc3bc45627d6c
CRs-Fixed: 587497