SF: Update display properties on hotplug connect

When a hotplug connect event for already connected display
is received, destroy and recreate the display device in SF,
then send a "hotplug connect" event to Display manager. This
way display properties will be updated.

Bug: 143451809
Test: atest libsurfaceflinger_unittest
Test: atest SurfaceFligner_test
Test: atest CompositionTest
Test: Manually on device:
      2. adb shell dumpsys display
      3. unplug primary display
      4. plug another display
      5. adb shell dumpsys display
Test: Manually on device:
      1. disconnect and reconnect display
      2. power off and on the screen
      3. make sure the device didn't crash

Change-Id: I89996d9340f6570fa5ae0cc0977eaba7a2d3693c