Add hotplug support for primary display.

When the primary is connected/disconnected on tv devices HWComposer updates
it's display parameters but doesn't destroy or recreate the display.

Bug: 18698244

Change-Id: I759c8f75d3e3a7462b85eb51973fb5072b71a702
(cherry picked from commit 10613dc3b565e95d3d5f459ec70fd2f6a77f807a)
1 file changed