[temp] revert flash notifications until device tree support is properly ...

...implemented

a few devices don't have sysfs available for example.. and permissions are incorrect on
the path for some others.  will bring back later without relying on legacy torch to
carry the weight

Squashed commit of the following:

commit 42efcbc4036b20dc30c2837bd47380308eae0e0d
Author: Dave Kessler <activethrasher00@gmail.com>
Date:   Tue Dec 30 20:23:35 2014 -0500

    Revert "Flash notifications [1/2]"

    This reverts commit fa4066e85b6143c4fad9616d324a31d25476e586.

    Conflicts:
    	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

    Change-Id: I20b38faf55f453697b6fbf9ae885f694ec9208ca

commit 9d050abe6c89d82ea11d30fee20ce9a9adf663fa
Author: Dave Kessler <activethrasher00@gmail.com>
Date:   Tue Dec 30 20:22:59 2014 -0500

    Revert "Flash Notifications: make sure proximity sensor gets unregistered if the feature is shut off"

    This reverts commit 3453ce69138c0c05f0d3d0a4e340053af8f5d0f6.

commit 2a8a8bc7163fdcd3b726623ed1df9628ef4815de
Author: Dave Kessler <activethrasher00@gmail.com>
Date:   Tue Dec 30 20:22:50 2014 -0500

    Revert "Flash Notifications: clean up register/unregister methods"

    This reverts commit b6f34d538cb7586c4ffc1efe862916ba18e7d473.

Change-Id: Ie6f95533d8cc5b8819dae1683d297678c3da9a9f