Re-add auto brightness configuration UI (2/2).

Change-Id: I6c56a48fa2145c58a5f203ed56051451ef3f977d
Bluetooth: Set isPreferred to true for PanProfile Connections.

isPreferred is always true for PAN profile so that DUT can
initiate connection with remote device. Curretnly we are
returning true only when pan profile is in connected, so
it will return false when pan profile is not connected and
will never initiate connection on click.

Change-Id: I7c789add73ca944d074b0ecd8af223f6d61b547a
CRs-fixed: 463887
Bluetooth: Not allow Blank BT device name.

Add empty string check for BT device name
and not enable ok button until entered
device name is not empty.

Change-Id: Ib7c460bee5c8d86d13acd66d228279dd1a240c25
CRs-fixed: 471158
Bluetooth: Handle pairing Cancel intent.

Receive Pairing cancel intent and clear pairing request
from notification window.

CRs-fixed: 463362

Change-Id: I63c9299edca4356485f26cbc6332e3be9bdfbf17
Bluetooth: Handle BT search while rotate screen

Enable screen orientation in Settings app manifest.

CRs-Fixed: 519022
Change-Id: I74b70dafa1d8d12bf6770cb44a808cdf51555940
Bluetooth: Remove out of range devices after ScanComplete

Change to remove device from UI when Bluetooth of remote
device is off or not discoverable anymore. Without this
change a device that discovered previously is available
in available devices list always, though the remote device
is not discoverable anymore. The current change updates
available devices list on scan complete removing the
devices that are available in cached devices and are not
disvorable anymore.

This reverts commit 1b652eb600ad7b4a769ad495bbb7eb4c6ab82fb2.

CRs-Fixed: 523374
Change-Id: Ia250d52e6fb7a69af242c961d33027f1e724ab25
Bluetooth: Security: Add Null check during pairing cancel intent.

Added null check, so before posing event we can restrict events,
if cached device list is empty

Change-Id: I458d181abe5eec2497b80b1713ddbc3502b79786
CRs-Fixed: 546364
Revert "Re-add auto brightness configuration UI (2/2)."

This reverts commit bc071677a410099da498a3c50444b18e0db9a113.