Fix soft reboot using power menu through tile, navring and recent long press

- Using slim roms idea of this commit: https://github.com/SlimRoms/frameworks_base/commit/2d7b1afb903858bf26ac98dc9de64924a5ce9a05 and calling all power menu actions from the same thread

Change-Id: Ie4768a1722a41164474ef300f4a1b67c535349f6