libcopybit: Correct AOSP license marking.

Change-Id: I6beffe8a33605132468a76f4ef4221266b954ea5
hwc: Support swap interval zero

Set debug.egl.swapinterval to zero to disable
fences with MDP composition enabling swap interval zero.
This is to measure performance only and will cause tearing.
CRs-fixed: 429343
Change-Id: I1460a02d568e69826800486a9a695d7a8953d4f8
hwc: Handle ext display device conn/disconn requests

  On HDMI connection, two uevents are generated
    1."change@/devices/virtual/switch/hdmi"
    2."change@/devices/virtual/switch/hdmi_audio"
  Since we look for "change@/devices/virtual/switch/hdmi",
  Display HAL will process the hotplug request twice.
  This causes regression on HDCP enabled devices.

  Change involves to check for uevent str with
  "change@/devices/virtual/switch/hdmi" to ensures
  that we process connection request only once.

Change-Id: Ica97fd4ef3c8e1064e7d757ab754bb1ee4a3fcaa
CRs-Fixed: 429803
hwc: Retry vsync on EBUSY

The driver returns EBUSY if it is unable to complete the frame
within a timeout - this is a recoverable error

Change-Id: Ifde01c1d7515598a82d032c0ba869fa658b050a9